now visitors can explore a former brewery sela and i'm escape tunnel arnold got inspired to explore the limits of the ground in paris. when i was studying urban regional planning in 1988 i got to know some parisian urban planners that's how i met a bunch of people who explore parisian catacombs there were 3 rival groups. i helped one carry out measurements and accompany them for 2 days that got me hooked when i returned to berlin i told myself i had to find out what lies below. what is nothing but important i moved up north and this newly built entrance leads to an escape tunnel that was secretly to help 17 east german citizens flee to west berlin he said the most being completed but was discovered before it could be used. klaus goodman from west berlin helped dig the tunnel he wanted to smuggle his pregnant wife out of the spolin with an organ this is the original tunnel from that came 7971 it's the only one preserved in its original state from a time when berlin was divided. the tunnel diggers various original tools are on display to. at street level stones the location of the tunnel