What Lies Beneath The Streets Of This Kansas City Is Creepy Yet Amazing

By now, you are probably familiar with the story of Leavenworth and the strange, unexplained city lurking below the streets. If you are not, here is a small bit of information that we know:

Spanning an incredible three city blocks and housing several abandoned store fronts and tunnels is the impressive, well-constructed city that is thought to date back to sometime in the 1800s. To get a better look into this underground world, check out this archive video from Kansas City’s KCTV5:

What do you think of this underground phenomenon? Do you have any theories as to what it used to be?