Bellver Castle is a unique circular castle located on a hill overlooking Palma. It is one of the few circular castles in Europe and offers panoramic views of the city and the surrounding countryside. The castle was built in the 14th century and served as a royal residence, military fortress, and prison throughout its history. Visitors can explore the castle's interior, which now houses the City History Museum, showcasing artifacts and exhibits related to the history of Palma. The castle's courtyard is also a popular venue for concerts and cultural events.