A lot of underground galleries exist on the territory of Samara region. Now shafts are blocked by cave-ins. But it’s obvious that there were enormous underground constructions. The only example of this project is a famous Stalin’s bunker which was turned into museum in 1911. But it’s only a small part of great underground constructions. We no nothing about Samara underground world. It was constructed top secretly. And the convicts working on it were then shot. Samara underground keeps a lot of mysteries which probably would be never revealed.