Okinotorishima

Reef in the Philippine Sea

Okinotorishima , or Parece Vela, is a coral reef, geologically an atoll, with two rocks enlarged with tetrapod-cement structures. It is administered by Japan with a total shoal area of 8,482 m2 and land area 9.44 m2 (101.6 sq ft). Its dry land area is mostly made up by three concrete encasings and there is a 100 by 50 m stilt platform in the lagoon housing a research station. There is a third completely artificial tetrapod-cement islet.

This keyword could refer to multiple things. Here are some suggestions: