Inside ‘secret Nazi bunker used for weapons testing’ in Duisburg

Chilling photos have emerged showing what is explorers believe is an abandoned Nazi bunker once used for testing weapons.

Bullet holes were discovered in the walls of a chamber found in a network of tunnels under Duisburg in Germany.

Urban explorer Warren Tepper, from Hampshire, said he found the bunker after climbing through a hole in the wall of an underground passageway.

It is thought the area was a shelter for Nazis during bombing raids by Allied forces and was used for weapons testing with ammunition fired into steel plates. 

Chilling photos have emerged showing what is thought to be an abandoned Nazi bunker used for weapons testing under the city of Duisburg. Pictured is one of the tunnels that led to the secret chamber

Urban explorer Warren Tepper, from Hampshire, said he found the shelter after climbing through a hole in the wall of the underground passageway. Eerie chambers thought to have been used during Nazi Germany were found to contain rusting metal storage racks and chains

Urban explorer Warren Tepper, from Hampshire, said he found the shelter after climbing through a hole in the wall of the underground passageway. Eerie chambers thought to have been used during Nazi Germany were found to contain rusting metal storage racks and chains

Bullet holes were discovered in the walls of a chamber which was found in a network of tunnels under Duisburg, a city in western Germany

Bullet holes were discovered in the walls of a chamber which was found in a network of tunnels under Duisburg, a city in western Germany

Mr Tepper and his co-explorer also found four-inch-thick bullet holes in metal along with similar holes in bulletproof glass, which he said he believed were from when Americans raided the site. 

Mr Tepper said: ‘At first we didn’t really see much it was just a set of empty tunnels but then we climbed through a hole in the wall into another part of the tunnels that had been blocked off. 

‘It was only then that we started to get a feeling for how big and amazing the tunnels were.

‘As we carried on walking round the tunnels we started to find more and more exciting stuff. Then we found the munitions storage and were both really excited at this point, so we carried on in the miles of underground tunnels.

‘Then we came across the weapons testing room and were like two kids at Christmas. We were amazed and shocked as to what we had just found in the tunnels it was the gift that kept on giving 

It is thought the area was a shelter for Nazis during the bombing by Allied forces and was used for weapons testing with ammunition fired into steel plates

It is thought the area was a shelter for Nazis during the bombing by Allied forces and was used for weapons testing with ammunition fired into steel plates

Mr Tepper and his co-explorer also found four-inch-thick bullet holes in metal along with similar holes in bulletproof glass, which he said he believed were from when Americans raided the site

Mr Tepper and his co-explorer also found four-inch-thick bullet holes in metal along with similar holes in bulletproof glass, which he said he believed were from when Americans raided the site

Mr Tepper claimed that the site was a secret weapons testing bunker and said he had learned that Hitler had attended meetings in tunnels under the city 

Mr Tepper claimed that the site was a secret weapons testing bunker and said he had learned that Hitler had attended meetings in tunnels under the city 

Pictures from inside the bunker appear to show a series of bullet marks in thick metal sheets, prompting speculation the rooms were used for Nazi weapons testing

Pictures from inside the bunker appear to show a series of bullet marks in thick metal sheets, prompting speculation the rooms were used for Nazi weapons testing

‘It looks like they were firing some big calibre guns down there that would have echoed through the tunnels and been extremely loud. 

Mr Tepper claimed that the site was a secret weapons testing bunker and said he had learned that Hitler had attended meetings in tunnels under the city. 

‘From what I have read it was captured by the Americans hence the bullet holes in the bullet proof glass.’ 

Mr Tepper, from Finders Beepers History Seekers, said this was one of the most impressive sites he had visited.

The explorers said they found bullet holes in the walls and on metal sheets in the underground chambers under Duisburg, Germany

The explorers said they found bullet holes in the walls and on metal sheets in the underground chambers under Duisburg, Germany

Mr Tepper said 'big guns' must have been used in the bunker based on the size and number of bullet holes in the chamber

Mr Tepper said ‘big guns’ must have been used in the bunker based on the size and number of bullet holes in the chamber

Mr Tepper and his co-explorer (pictured), from Finders Beepers History Seekers, said this was one of the most impressive sites they had visited

Mr Tepper and his co-explorer (pictured), from Finders Beepers History Seekers, said this was one of the most impressive sites they had visited

He released the footage on his own YouTube Channel ‘Warren Urbexing’ gathering thousands of views within a few days.

‘We didn’t know anything about the tunnels before we went, like how big or what they were used for. Then we saw how big they were and found the bullet holes that really excited us even more about the tunnels,’ he said.

‘When we first walked into the weapon testing room, I thought it was a furness where they heat treated metal and didn’t really know what to think until I saw the metal with the bullet holes in the massive bit of metal.

‘Then everything fell in place and I realised exactly what it was we were standing in and what it was used for. The bullet holes in the metal said to me that big guns were fired down in the bunker and it was scary to think of that going off in tunnels.’ 

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