Belgrade, the capital of Serbia, is one of the grittiest European cities famous for its chaotic, yet colorful past. Discover some of Belgrade's best kept secrets with this underground sightseeing tour of the city, and uncover secret paths, catacombs, dungeons and more! Starting with a pick up from your hotel, your tour takes you straight to the heart of it – the Belgrade Fortress. Declared a Monument of Culture of Exceptional Importance in 1979, the fortress is one of the most popular tourist destinations in Belgrade, and rightly so. Once home to the entire population of Belgrade, the history of Belgrade was once equal to the lives and stories behind these walls. Once inside, head towards the Roman chambers – where you will find the foundation of the Roman Castle Gate, built in the 2nd century. Afterwards, you'll head towards the bunkers constructed after the Second World War. Here, listen to all the spy-stories and intriguing conspiracy theories that date all the way back to the Cold War. Afterwards, pay a visit to BIg Powder Magazine, located in the Lower Town of Belgrade Fortress. The Big Powder Magazine was built between 1718-1720 in order to create a shelter for gunpowder, protected from the enemies. To this day, the Powder Magazine is still in fantastic condition. Finally, the tour ends at Karađorđeva Street, the heart of modern Savamala. Visit a wine-cellar and sample some delicious local wine – the perfect way to end your tour.