Everyone Thought It Was A Beggar’s Cardboard House — Until Someone Looked Inside

The actual reason

Right behind the panel, and built inside the viaduct’s concrete wall, was a tunnel of sorts. Sarah estimated that it was a piece of sewer piping that was no longer in use, since no water or foul residue remained on the pipe.

“This cardboard hut isn’t a home, it’s just a front to disguise this tunnel opening!”