A perfect way to discover the hidden secrets of Belgrade fortress and it's long and vivid history is to explore it's underground. First of them is Roman well, built in 18th century, which represents heritage from Austrian time. Many mysteries are connected to this place, and interesting fact is that it was Alfred Hitchcock's favorite spot in Belgrade. The tour continues to Army bunker - from the time of the Cold War after the World War 2, where you will learn about some of the President Tito's political games between great countries. The third stop is Gunpowder warehouse - where you will have the chance to touch the walls of the cave which Austrians built as the part of the fortress which served as the defense of Christian Europe against Turkish Empire. This warehouse is also an exhibition place where you will see sarcophaguses and altars collected from different archeological sites on Serbian territory. The tour ends with glass of local wine on the Sava river bank.