Image: YouTube/FINDERS BEEPERS HISTORY SEEKERS / YouTube/FINDERS BEEPERS HISTORY SEEKERS

Urban explorer Warren Tepper and his friend Matt Nadin are on borrowed time traipsing through an underground tunnel. They know a security van circles somewhere overhead, but they still keep pushing on deeper. And it’s a good thing that the pair carry on with their quest, too, as what they are about to uncover will not only astonish them, but also the world at large.

Image: Central Press/Hulton Archive/Getty Images

The site that Tepper and Nadin chose to explore has a very lengthy and potentially dark history, in fact. You see, the tunnels appear to have played a part in World War II. And their location points to who may once have used them, as they snake beneath Duisburg, Germany – a city that at one point was held by the Nazis until the Allied forces took over the area.

ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT