Bellver Castle, located in Palma de Mallorca, Spain, is a unique Gothic-style castle built in the 14th century for King James II of Majorca. It stands out for its circular shape, making it one of the few circular castles in Europe. Originally a royal residence, it later served as a military prison and is now a popular tourist attraction and the city's History Museum. With its stunning architecture and rich history, Bellver Castle offers visitors a glimpse into the past while providing a picturesque backdrop for various events and ceremonies.