Standing on a 410-foot (125-meter) cliff overlooking the confluence of the Danube and Sava Rivers, Serbia's Belgrade Fortress has beckoned visitors (and scared off enemies) for centuries. This 124-acre (50-hectare) vantage point served as a military outpost since the first century AD, but is now enjoyed for its history, enormity and spectacular sunset views.
Essentially a large park within fortress walls, the site contains two museums, two towers, a bunker and a Roman Well spread out throughout three main areas: Upper Town, Lower Town and Kalemegdan Park. Upper Town features preserved ramparts of the fortress, as well as the Military Museum, Victor Monument and Ruzica Church, which contains chandeliers made of ammunition casings and a chapel with an allegedly miraculous spring; Lower Town sits on the banks of the Danube River, and while it was the city center in the Middle Ages, only a few buildings have survived. The 18th century Turkish Bath now houses a planetarium.