Kalemegdan is the biggest park in Belgrade and, at the same time, the most important historical complex, in which the Belgrade fortress dominates overlooking the confluence of the Sava and Danube rivers. The name Kalemegdan applies only to the plateau around the fort, which in the eighties of the 19th century turned into a park. The Plateau was used as an enemy observation point, as well as the place where soldiers waited for their enemies, while the fort was the main military stronghold of Belgrade. Its name derives from the Turkish words "kale" (fortress) and "mejdan" (square). The Turks also called it Fichir-bair, which means "hill of thinking."
In Kalemegdan, you have the Military Museum, the Art Pavilion "Flower Zuzoric", the City Institute for Protection of Cultural Monuments, the Zoo, the Roman well, the children's amusement park, the Tomb of national heroes, a number of sports facilities, restaurants and the Natural History Museum. In September 2010, in gratitude to the people of Japan, a Japanese fountain was inaugurated in Kalemegdan.