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The Osa Peninsula is in southwestern Costa Rica, in the Puntarenas Province. The Pacific Ocean borders it on the west and the Golfo Dulce on the east. The area was formed geologically by a faulting system that extends north into California.

The Peninsula is one of the most remote and ruggedly beautiful regions in Costa Rica. With pristine beaches and virgin forest, the Osa Peninsula is described by National Geographic as the 'most biologically intense place on Earth'.

A large part of the Peninsula is a wildlife/forest preserve that is protected - the Osa Conservation Area. At least half of all species living in the country can be found on the Peninsula.

A large part of the Peninsula is a wildlife/forest preserve that is protected - the Osa Conservation Area. At least half of all species living in the country can be found on the Peninsula.

The area’s wildlife amounts to a breathtaking 250,000 species. This includes 323 species of endemic plants and animals that are not found anywhere else on the planet.

A little more than 5000 people live on the Peninsula. Its main town is Puerto Jimenez which has its own airport and provides access to Corcovado National Park.