Cave explorers in Israel believe they have discovered the world’s longest salt cave, larger than the previous record-holding cave in Iran.

The Malham cave, first partially mapped in the 1980s, is now known to stretch for over 10 kilometres (6.25 miles), through Mount Sodom, Israel’s largest mountain.

The cave is adorned with glittering stalactites and stalagmites formed from salt crystals, and it is close to where the Bible claims Lot’s wife was turned into a pillar of salt upon the “sight of God”, who had descended to Earth to bring destruction upon Sodom and Gomorrah.

Indeed, the cave’s main outlet is close to a salt pillar nicknamed “Lot’s wife,” after the biblical character.

Amos Frumkin, the founder and director of the Hebrew University’s Cave Research Centre, mapped the first five kilometres in the 80s, but two years ago, Israeli spelunker (cave diver) Yoav Negev, the founder of the Israeli Cave Explorer’s club, decided he wanted to complete the exploration.

The breathtaking photos of Icelandic ice caves Show all 14 1 /14 The breathtaking photos of Icelandic ice caves The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Guide Einar Runar Sigurdsson is seen ice climbing inside the 'Waterfall Cave' PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Looking up from inside the 'ABC cave' - which stands for Amazing Blue Cave. Guide Einar Runar Sigurdsson can be seen ice climbing on the glacier outside. PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Guide Einar Runar Sigurdsson is seen ice climbing inside the 'Waterfall Cave' PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Guide Einar Runar Sigurdsson is seen ice climbing inside the 'Waterfall Cave' PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Inside the 'ABC cave' - which stands for Amazing Blue Cave. PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Inside the 'ABC cave' - which stands for Amazing Blue Cave. This view shows a snow storm outside the entrance to the cave. PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Inside the 'ABC cave' - which stands for Amazing Blue Cave. Guide Einar Runar Sigurdsson is seen taking a photo at the entrance to the cave PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: On top of the Vatnajökull glacier PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Inside the 'ABC cave' - which stands for Amazing Blue Cave. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Looking up from inside the 'ABC cave' - which stands for Amazing Blue Cave. Guide Einar Runar Sigurdsson can be seen ice climbing on the glacier outside. PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Inside the 'ABC cave' - which stands for Amazing Blue Cave. Guide Einar Runar Sigurdsson is seen taking a photo at the entrance to the cave PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: Inside the 'ABC cave' - which stands for Amazing Blue Cave PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony The breathtaking photos of Icelandic ice caves Icelandic ice caves in Vatnajökull Wednesday 25th November 2015, Vatnajökull national park, Iceland: Photographer Mikael Buck with assistance from renowned local Icelandic guide Einar Runar Sigurdsson, explored the frozen world of Vatnajökull glacier in Iceland using Sony’s world first back-illuminated full-frame sensor – which features in the α7R II camera. His images were taken without use of a tripod or any image stitching techniques in photoshop. This was made possible through Sony’s new sensor technology, allowing incredibly detailed low-light hand held photography. Previously images this detailed would have required carrying bulky equipment to the caves, some of which can require hiking and climbing over a glacier for up to two hours to to access. This picture: The view on top of the Vatnajökull glacier whilst hiking to access the caves PR Handout - editorial usage only. Photographer's details not to be removed from metadata or byline. For further information please contact Rochelle Collison at Hope & Glory PR on 020 7014 5306 or rochelle.collison@hopeandglorypr.com Copyright: © Mikael Buck / Sony 07828 201 042 / mikaelbuck@gmail.com © Mikael Buck/Sony

Last year a team of eight European and 20 local spelunkers spent 10 days mapping the cave, and then a second 10-day expedition this year with 80 local and international spelunkers finished measuring and mapping the cave with lasers.

Boaz Langford, a researcher at the university’s Caves Research Centre, and Antoniya Vlaykova, a Bulgarian cave explorer from the European Speleological Federation, led the expedition.

“What’s unique about this cave, as opposed to other salt caves in the world, is that it’s the longest in the world,” Mr Langford said.

They plan to publish the complete map of the cave in a professional publication in the coming months.

One of the chambers of the cave has been named the “Wedding Hall” due to its spectacular salt stalactites.

There is no official record for the longest salt cave, and such designations are generally decided by consensus among cave researchers after an underground chamber is mapped and published.

Iran’s Namakdan cave, which is about 6 kilometres (4 miles) in length, was identified as the longest salt cave after a study by Czech and Iranian scientists in 2006.

The relationship between the Malham cave and Mount Sodom is closely linked, as the mountain is essentially a large salt block, formed by the shifting of the Earth’s plates at the northern end of the 4,000-mile Afro-Arabian Rift Valley.

The tectonic activity also created the Dead Sea. Over millions of years successive flooding of the deep depression lay down thick layers of salt.

The mountain is covered by a thin layer of rock, but when it rains, the water trickles down into the salt layer eventually carving out the caves and forming the stalactites and stalagmites.

Efraim Cohen, one of the Hebrew University cave explorers, described the process of locating the cave’s entrances from the surface, rappelling down into surface shafts, squeezing through tight passages, and measuring each of the cavern’s serpentine branches with lasers.

Despite the difficult environment, he said the cave’s splendour makes it worth it.

“All the stalagmites and stalactites, their beauty, their colour — they’re really white, they’re shining, they’re amazing,” he said.

Radiocarbon dating of wood fragments found inside the cave have helped date its formation to around 7,000 years ago, making it extremely young by speleological standards.

“The reason why it’s so young is because it’s made of salt,” Professor Frumkin said.

“Limestone caves are much slower to form. They are usually much older. But this one is developing very fast so it’s one of the youngest caves in the world.”