Katsuren Castle stands on a promontory on Okinawa's Katsuren Peninsula, surrounded on three sides by the blue water of Katsuren Bay. The ruins are compact but dramatic, built on a natural limestone hill that rises sharply from flat agricultural land. From the highest point there are panoramic views across the East China Sea and back to the main island. The castle is one of the oldest of the surviving gusuku sites, with some sections dating to the 12th or 13th century.
The site is a UNESCO World Heritage component and reasonably easy to visit independently — there is a small museum at the entrance and the walk up through the terraced stone enclosures takes about 30 minutes. The approach through the lower gate and into the successive baileys is particularly well-preserved, with original stone paving and stairways. Katsuren makes a natural pairing with a visit to nearby Nakamura-ke, a restored 18th-century Ryukyuan farmhouse that offers a different perspective on the same era.