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. The Planty Park was created in the beginning of the 19th century, when Krakow's City Walls were brought down, as a part of the Krakow Senate's plan to refurbish the city. The idea came from Feliks Radwanski, the same architect that saved the Florian Gate and the Barbican from being pulled down with the rest of the walls.The Planty Park is in fact composed of about thirty gardens, each of them having its own unique style. 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.