Urasoe yōdore

Urasoe yōdore - Credit: Wikimedia Commons

is one of the three royal mausoleums of the Ryukyu Kingdom, along with Tamaudun at Shuri Castle and Izena Tamaudun near Izena Castle in Izena, Okinawa. It is located in Urasoe, Okinawa, in a cave on a cliff to the northeast of Urasoe Castle. It houses the remains of three rulers of the Ryukyu Islands, along with one king of the Ryūkyū Kingdom separated from the others by several centuries. Read more on Wikipedia

type: monument
date from: 1261

Source: en.wikipedia.org