1. Bellver Castle, located in Palma de Mallorca, is a unique and well-preserved fortress that stands on a hill overlooking the city and the bay. It is one of the few circular castles in Europe and was built in the 14th century for King James II of Mallorca. The castle has a distinctive round shape with three semi-circular towers and an inner courtyard. It has served various purposes over the centuries, including as a royal residence, a military fortress, and a prison. Today, Bellver Castle is a popular tourist attraction and offers stunning panoramic views of Palma and the surrounding area.

2. Bellver Castle is open to visitors all year round, with varying opening hours depending on the season. It is advisable to check the official website or contact the castle directly for the most up-to-date information. Unfortunately, I do not have a phone number available at the moment.

3. Tickets for Bellver Castle can be purchased on-site at the entrance. The prices may vary for adults, children, students, and seniors. It is recommended to check the official website for ticket prices and any special promotions. Visitors can reach Bellver Castle by public transportation, taxi, or car. The castle is located about 3 km from the city center of Palma, and there is parking available for those arriving by car.