Jutting out into the Pacific Ocean in the southwest corner of Costa Rica, the Osa Peninsula encompases lush primary rain forests and a complex system of freshwater and marine resources. This remote region includes multiple protected areas including Corcovado and Piedras Blanca National Parks.

In 1975, with an assisted land aquisition of 86,485 acres, The Nature Conservancy helped the Costa Rican government create the more than 100,000 acre Corcovado National Park on the western part of the peninsula.

The Osa Peninsula is a geological formation which developed independently from the rest of Costa Rica and then joined the isthmus several million years ago. Its unique formation and naturally wet systems - which differ from the rest of the dry Pacific - have produced high levels of biodiversity.

More than 355 species of birds are found on the Osa Peninsula.