Petrovaradin Fortress is a fortress in Novi Sad, Serbia. It is located in the province of Vojvodina, on the right bank of the Danube river. The cornerstone of the present-day southern part of the fortress was laid on October 18, 1692, by Charles Eugène de Croÿ. Petrovaradin Fortress has many underground tunnels as well (16 km of underground countermine system).
In 1991 Petrovaradin Fortress was added to Spatial Cultural-Historical Units of Great Importance list, and it is protected by the Republic of Serbia.
The tower's clock in which the short hand shows minutes and the long hand shows hours is definitely out of the ordinary.
EXIT festival is an annual summer music festival that has been held at the fortress since its inception in 2001. Since then, it has grown from the biggest festival in South-Eastern Europe, to one of the biggest in Europe.