Belgrad, Uferpromenaden

Beautiful view of the Kalemegdan fortress of Beograd.

Pictures of the Kalemegdan fortress from the south banks of the river Sava are great. That part is called Lower Town with Nebojsina Kula as a main attraction.
Once you are there, head up to the Upper Kalemegdan Terase. You will have to hike the bike as there are stairs leading up. On your way up, stop by the Belgrade Observatory, Church of Saint Petka and Church Ruzica. They are one of the kind and you cannot miss them. Enjoy

Kalamegdan is very worth visiting, learning war historical facts

Belgrade Fortress, Park of Friendship, Floating Clubs and Restaurants, Luna Park