The second largest Czech city hides many mysteries. Especially the stories about the Brno underground would take up a whole book... What happened inside the legendary Špilberk hill, where the Nazis also operated? What are the “residents” of the second largest crypt in Europe hiding? Why were the winding streets of the mysterious dungeon under the main square created? There is only one thing left to do: go to the Brno dungeon and get to the bottom of the secrets!