Omo‘a is the name of a small town and valley at the head of a bay

Bay

A bay is an area of water mostly surrounded by land. Bays generally have calmer waters than the surrounding sea, due to the surrounding land blocking some waves and often reducing winds. Bays also exist as an inlet in a lake or pond. A large bay may be called a gulf, a sea, a sound, or a bight...

 by the same name, on Fatu Hiva

Fatu Hiva

Fatu Hiva is the southernmost of the Marquesas Islands, in French Polynesia, an overseas territory of France in the Pacific Ocean...

.

The bay of Omo‘a is the southernmost bay on the western coast of Fatu Hiva, and provides a good anchorage. The village of Omo‘a was home to 247 inhabitants at the 2002 census. The village is home to the island's only Protestant church. The valley of Omo‘a is well-watered, and curves in a half-moon shape, first to the southeast, and then to the northeast, terminating at the island's central plateau

Plateau

In geology and earth science, a plateau , also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A highly eroded plateau is called a dissected plateau...

. This is where Thor Heyerdahl

Thor Heyerdahl

Thor Heyerdahl was a Norwegian ethnographer and adventurer with a background in zoology and geography. He became notable for his Kon-Tiki expedition, in which he sailed by raft from South America to the Tuamotu Islands...

 and his wife came ashore in 1937, an experience recorded in his book Fatu Hiva.