A dark cave thousands of feet up the side of a remote mountain in the Philippines is the final resting place of these curious corpses known as 'fire mummies'.

The Ibaloi people, an ancient race from the Philippines, smoked their dead dry for months to mummify them - giving them their firey nickname.

The preserved remains lie in dark caverns 4,000ft up the side of Mount Timbac, near Kabayan in the province of Benguet, 200 miles north of capital Manila.

Scroll down for video

Creepy: Some of the Ibaloi fire mummies of the Philippines, which were smoked dry for months to preserve them before being locked away in their mountain resting place for as long as 1,000 years

Necropolis: Hundreds of skulls are piled up in the cave up the side of a mountain 200 miles north of Manila

Protected: Some of the corpses have been transferred to wooden boxes, presumably to protect them

Some of them have been locked away for more than 1,000 years.

The Ibaloi's burial practice endured until the arrival of Spanish colonisers four hundred years ago and the mummy caves themselves remained untouched until the 19th century.

Although only a handful of the mountainside Ibaloi tombs are open to the public, many have become the target of vandals and looters in recent years.

It is believed only a few Ibaloi elders know the specific locations of the 80 sacred caves. They are said to perform ancient rituals at the tombs to this day.

Well preserved: A close up of the feet of one corpse show how well it has lasted over hundreds of years

Ancient: The Ibaloi's burial practises endured until the arrival of Spanish colonisers four hundred years ago

Camera shy: Edgar Alan Zeta-Yep, 31, described how some mummies were positioned with their hands over their faces 'as if to shield the light from our torches'. Right, Mr Zeta-Yep looks at the entrance to the cave

Edgar Alan Zeta-Yep, 31, from the Philippines, hiked up Mount Timbac to see the ancient mummies. His visit came two decades after Edgar first saw one of the mummies at a Bangoiu City museum.

It was a spooky and enlightening experience crouched inside a small and damp rock shelter to admire and photograph the mummies really up close

Mr Zeta-Yep, who has been a travel photographer for seven years, told Mercury Press: 'I have always been fascinated by them.

'It was a spooky and enlightening experience crouched inside a small and damp rock shelter to admire and photograph the mummies really up close.'

Mr Zeta-Yep used a DSLR camera on a portable tripod to take the shots with a long exposure, to capture the detail inside the dark caves.

He said: 'After murmuring prayers, our Ibaloi guide lifted the covers. They were lying inside wooden coffins in a fetal position, some with hands over their faces as if to shield the light from our torches.