*Bellver Castle is a Gothic-style castle on a hill 3 km to the west of the center of Palma on the Island of Majorca, Balearic Islands, Spain. It was built in the 14th century for King James II of Majorca, and is one of the few circular castles in Europe. First serving as the residence of the Kings of Majorca, and afterward long used as a military prison throughout the 18th to mid-20th century, * https://en.wikipedia.org/wiki/Bellver_Castle Experimental, reconstructed from various 4K drone footage only