I’ve written about this before. Moscow has a vast network of tunnels and halls under its surface. Some old bunkers, forgotten subway stations and much more. There are a few brave, who explore these tunnels. Apparently you can even take tours. The last time I heard about it, I was told its not very safe, though. Apparently, besides of structural problems and other dangerous stuff, some criminals are using the tunnels and they don’t want you to hang out there. Well, I guess you don’t have to go down there. We are living in a time, where you can watch all of this online on Youtube. Enjoy!