This is a path leading to Dizdar Tower and Despot Gate at the Kalemegdan Fortress. According to the history books, they were both built in the 15th century. Dizdar Tower currently houses an observatory which is open to the public on weekends. (This picture is from a few weeks ago.)
We're having a bit of a cold snap here. I did get out to take some pictures today and by the time I put my camera away my fingers were numb, even with gloves on. You know what I'd like to get one day? A pair of photo gloves like these from LowePro. The main difference between these and regular gloves is they have rubber dots on them to help grip your camera. I image they probably sell these at hardware stores for people working construction out in the cold, or just where hand protection is needed but where it's also important to have a good grip. I've almost dropped my camera a few times from holding it with gloves on! Not good.