Port Hamilton

Geomundo (Korean거문도; Hanja巨文島/巨門島; RRGeomundo; MRKomundo), also known as Port Hamilton, is a small group of islands in the Jeju Strait off the southern coast of the Korean Peninsula, located approximately at 34°1′35″N 127°18′45″E / 34.02639°N 127.31250°E / 34.02639; 127.31250. The islands are 12 km2 (4.6 mi2). There are three principal islands, the two larger ones, Sodo to the west (Seo-do, 서도, 西島) and Sunhodo to the east (Dong-do, 동도, 東島) forming a harbor with the smaller island in the center. On this central island, Observatory Island (or Go-do, 고도, 古島), there was a British naval base from 1885 to 1887.

Today, the islands form a part of Samsan-myeon, Yeosu City, South Jeolla Province of South Korea, with the Samsan township offices located on Observation Island. The islands are also part of the Dadohaehaesang National Park.