When it comes to sightseeing, Serbia has quite a lot to offer. Starting from Belgrade , which is a city rich in museums, monuments and interesting places. The charming Subotica with its autro-Hungarian architecture is also noteworthy. Novi Sad also has a beautiful old town. It is definitely worth visiting Drvengrad , a town created by Kusturica, as well as the intriguing Niš with the Skull Tower. Serbia is also amazing strongholds. The most interesting ones are the one in Petrovaradin, Smedereva or the Kalemegdan fortress in the capital.