🇫🇲 Federated States of Micronesia · Archaeological wonder
Nan Madol
Saudeleur Dynasty 1200–1500 CE; construction ~1180–1628 · Pohnpeian / Saudeleur
Abandoned basalt-and-coral city covering 18 km² of reef flats southeast of Pohnpei with ~92 artificial islets bounded by sea walls and tidal canals, with walls up to 8 m high built from columnar…