Cocos is an uninhabited island off the coast of Costa Rica, some have described it as the most beautiful island in the world.

Cocos Island is an oceanic island of both volcanic and tectonic origin. It is the only emergent island of the Cocos Plate, one of the minor tectonic plates. An Argon–Potassium radiometric determination established the age of the oldest rocks between 1.91 and 2.44 million years and is composed primarily of basalt, which is formed by cooling lava. The landscape is mountainous and irregular and the summit is Cerro Iglesias at 575.5 m . In spite of its mountainous character, there are flatter areas between 200–260 m in elevation in the central part of the island, which are said to be a transitional stage of the geomorphological cycle of V-shaped valleys.

Surrounded by deep waters with counter-currents, Cocos Island is admired by scuba divers for its populations of Hammerhead sharks, rays, dolphins and other large marine species.

Cocos has become well know for its fish and its status as a Marine World Heritage site.