
Incredible footage has revealed a former Cold War bunker hidden within a mountain, which appears to lie completely untouched since its closure.

Set in a top-secret spot in the midst of a forest in southern Sweden, the bunker was reportedly an old base for conducting surveillance during hostilities with the Soviet Union and Warsaw Pact.

The exact location of the historical site has been kept under wraps by the intrepid explorers who discovered it, who investigated its eerie abandoned passages armed only with flash lights and a camera.

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Incredible footage has revealed a former Cold War bunker hidden within a mountain, which appears to lie completely untouched since its closure. Set in a top-secret spot in the midst of a forest in southern Sweden, the bunker was reportedly an old base for conducting surveillance during hostilities with the Soviet Union. This image shows its hidden entrance

FIGHTING FOR FREEDOM The Free Solo group claim they are always highly respectful of historical sites and leave anywhere that appears to be locked up alone. The group is keen to stress the historical importance of sites, which they claim still hold vital resonance now. A Free Solo member said: 'It's not just rubbish. This place is very, very, important because it helped freedom to sit strong in the fifties and sixties. 'It's important to think about history – you have to pay for freedom. 'Many people think it's an old dream, but in these places you can see how hard people worked to make sure I can do things like take my children freely to school, or go to the hospital.' Advertisement

The site was uncovered by adventurer team Free Solo, who say they want to preserve the site from further intrusion.

It is believed to be one of many such facilities dotted around the Swedish countryside.

The sinister hallways and empty rooms are a still-frame of history.

It features a kitchen area still filled with pieces of crockery and doors left ajar, as if the building was only recently abandoned by the intelligence workers who are said to have called it home.

A Free Solo member, who did not wish to be named, claims the bunker is a symbol of the fight to protect freedom and says it is vital to share footage of such sites.

The 42-year-old, from Malmö, Sweden, said: 'You feel like the spies have just been walking around it and as if they have only just walked out of the place. You can feel it.

'I have visited bunkers in Sweden before but none of them have been as complex as this one.

'If you stand in front of the entrance then you see it straight away, but even if you're stood just three metres (10 ft) away you don't see it.'

The facility stopped being used around 25 years ago. During the almost three minute long tour of the facility, footage reveals the creepy atmosphere inside.

The site was uncovered by adventurer team Free Solo, who say they want to preserve the site from further intrusion. This image shows the stairway to the bunker, which is concealed within the forest

The sinister hallways and empty rooms are a still-frame of history. This image shows a room which would have been used for sleeping by the intelligence agents who are said to have lived and worked inside the bunker

It also features a kitchen area still filled with pieces of crockery and doors left ajar, as if the building was only recently abandoned

It reveals a complex of interconnected rooms serving a multitude of purposes.

'My favourite part of it is when you enter through this massive steel door,' the group member said.

'You can see the walls of the mountain and as you move through suddenly it's very quiet and it's a house, an office, with a kitchen, a living room, places for sleeping.

'It's amazing. I'm not really sure how many people would have been there exactly when it was being used, it would have been very secret.

SWEDEN DURING THE COLD WAR Sweden was not occupied by German or other foreign forces during the Second World War. This was probably one of the main reasons for its exceptional prosperity after the war, backed up by American economic support, under the Marshall Plan to aid nations in western Europe. The Swedish military situation during the Cold War period was characterised by political neutrality, but it was also a strategic location in the front line with the Soviet Union. The nation had a strong coastal defence and air force, which contributed to a deterrent effect, an official Swedish defence policy aimed at preventing a Soviet attack. The country was prepared for total war in case of an attack from the Soviet Union and Sweden was self-sufficient in most of its military equipment, including cannons and aircraft. The Swedish military situation during the Cold War period was characterised by political neutrality, but it was also a strategic location in the front line with the Soviet Union. Military ties with Nato were therefore kept secret by the Swedish government because of its official policy of neutrality It would have been impossible for Sweden to be neutral in the case of a war between Nato and the Warsaw Pact and Swedish military forces were directed openly against the Soviet Union. The only realistic and successful possibility of defending Sweden in case of war was on the basis of support from the United States and its nuclear arsenal. Military ties with Nato were therefore kept secret by the Swedish government because of its official policy of neutrality. Most Soviet attack plans throughout the Cold War period involved the Nordic countries because of the Soviet desire for military control of and access to the North Atlantic. Another reason for the Soviet Union's interest in controlling access to the Baltic Sea were the many shipyards that could repair the Warsaw Pact's ships in case of war. Advertisement

'Even if there had been 100 people in there you never would have noticed.'

The Free Solo group claim they are always highly respectful of such historical sites, and as such they leave anywhere that appears to be locked up well alone.

The group representative said: 'This bunker is a very special one because it's out in the middle of forests. You don't even have roads there. It's set in a mountain, and built to withstand a nuclear bomb.

'The town I grew up in in Sweden is an old military town, so there are a lot of these old places. People growing up in the area know about them.

A Free Solo member, who did not wish to be named, claims the bunker is a symbol of the fight to protect freedom and says it is vital to share footage of such sites. This image shows an internal steel reinforced wall and doorway

During the almost three minute long tour of the facility, footage reveals the creepy atmosphere inside. This image shows a fridge, cooker and pots and pans left abandoned

The footage reveals a complex of interconnected rooms serving a multitude of purposes. This area shows a sink complete with cleaning fluids and other assorted paraphernalia

'A friend's father owns a bit of land nearby so knew of the place. When we were given the coordinates, I was stood metres from the building and even then it took 15 minutes to find it.

'I think we've had around 200 people contacting us to ask about this place and where it is, but we will never tell. We want to help preserve it.

'We want to show the video of it and make sure people know about these places and maybe give them an incentive to read about history.'

The group is keen to stress the historical importance of sites such as this, which they claim still hold vital resonance now.

The Free Solo group claim they are always highly respectful of such historical sites, and as such they leave anywhere that appears to be locked up well alone. This image shows a lift inside the facility

The group is keen to stress the historical importance of sites such as this, which they claim still hold vital resonance now. This image shows an abandoned room and wall tiles which have fallen down

Sweden was not occupied by German or other foreign forces during the Second World War. This image shows another view of an abandoned room whose purpose is unknown

The Free Solo member said: 'It's not just rubbish. This place is very, very, important because it helped freedom to sit strong in the fifties and sixties.

'It's important to think about history – you have to pay for freedom.

'Many people think it's an old dream, but in these places you can see how hard people worked to make sure I can do things like take my children freely to school, or go to the hospital.'

Sweden was not occupied by German or other foreign forces during the Second World War.

This was probably one of the main reasons for its exceptional prosperity after the war, backed up by American economic support, under the Marshall Plan to aid nations in western Europe.

The Swedish military situation during the Cold War period was characterised by political neutrality, but it was also a strategic location in the front line with the Soviet Union. This image shows a room which may have been used for recreation and relaxation

The nation had a strong coastal defence and air force, which contributed to a deterrent effect, an official Swedish defence policy aimed at preventing a Soviet attack. This image shows the top of a stair case within the bunker

The country was prepared for total war in case of an attack from the Soviet Union and Sweden was self-sufficient in most of its military equipment, including cannons and aircraft. This image shows a room with a TV and various electrical appliances

The Swedish military situation during the Cold War period was characterised by political neutrality, but it was also a strategic location in the front line with the Soviet Union.

The nation had a strong coastal defence and air force, which contributed to a deterrent effect, an official Swedish defence policy aimed at preventing a Soviet attack.

The country was prepared for total war in case of an attack from the Soviet Union and Sweden was self-sufficient in most of its military equipment, including cannons and aircraft.

It would have been impossible for Sweden to be neutral in the case of a war between Nato and the Warsaw Pact and Swedish military forces were directed openly against the Soviet Union.

It would have been impossible for Sweden to be neutral in the case of a war between Nato and the Warsaw Pact and Swedish military forces were directed openly against the Soviet Union. This image shows a hallway within the complex

The only realistic and successful possibility of defending Sweden in case of war was on the basis of support from the United States and its nuclear arsenal. This image shows another room withing the facility

The exact location of the historical site has been kept under wraps by the intrepid explorers who discovered it, who investigated its eerie abandoned passages armed only with flash lights and a camera. This Google Maps image shows the bunker blending in with the mountainous forest region it inhabits

The only realistic and successful possibility of defending Sweden in case of war was on the basis of support from the United States and its nuclear arsenal.

Military ties with Nato were therefore kept secret by the Swedish government because of its official policy of neutrality.

Most Soviet attack plans throughout the Cold War period involved the Nordic countries because of the Soviet desire for military control of and access to the North Atlantic.

Another reason for the Soviet Union's interest in controlling access to the Baltic Sea were the many shipyards that could repair the Warsaw Pact's ships in case of war.