A unique tour, let by Belgrades famed journalist and historian Zoran Nikolić, takes you deep under the surface of Kalemegdans fortress. There you will be able to witness various parts of history, from neolithic times to World War I, and get a sense of the tumultuous history Serbia has been through. With Mr. Nikolić's witty remarks and commentary though, you wont be left feeling raw. Except maybe your feet, so make sure to wear your comfiest gear. Book your visit via facebook or give them a call.