The Krakow Old Town is surrounded by a green ring called the Planty Park, gently separating the city center from the noisy outside world. Taking the four-kilometer walk around the old Krakow is worthwhile – some of the city's jewels are hidden between the trees of the Planty. A walk around the city centre takes about an hour, but at virtually any moment you can decide to end it and just go back to the Old Town at a place of your choice. While strolling around the Planty Park, you will come across the Palace of Arts, the Juliusz Slowacki Theater and the Barbican. The Planty are also a very good way to reach the Wawel Castle.