Novi Sad

Novi Sad needs 1 day: Petrovaradin Fortress, nicknamed the «Gibraltar of the Danube» for its size, with a maze of underground tunnels and river views, is the main draw. July is the one fixed date for anyone chasing the EXIT Festival, one of Europe's largest electronic music festivals, held right there every year; the rest of the year, April-October is best for a visit. It's inexpensive for Europe. For centuries it was the most important city for Serbs within the Austro-Hungarian Empire, leaving it a Central European architecture that sets it apart from the rest of Serbia.