At Main Market Square you can see St Mary's Basilica. There are also many public art galleries in Krakow, including the National Art Museum. Czartorvski Museum exhibits work by Leonardo and Rembrandt. The Wawel Castle and Wawel Cathedral are both historical sites that are worth a visit. If you want a night of entertainment, visit one of the theaters such as the Juliusz Theater. The Old Town is a must-see when visiting Krakow, as it displays remarkable architecture that has been preserved over the years. Planty Park, founded in 1822, is a well known park in Krakow. It surrounds the Old Town, taking the place of town walls. The area is divided into smaller gardens that are decorated with monuments. With an area of 4 kilometres, Planty Park is a good place to go for a walk. Jordan Park is another good place to escape the hustle and bustle of the city, with many facilities including a swimming pool and exercise equipment.