Parque Nacional Corcovado is located on the Osa peninsula in South Costa Rica. Corcovado boasts all four monkey species of Costa Rica (squirrel, white-faced, howler, and spider), many endangered large cat species and other mammals, birds, and a host of exotic frog, fungi, and insect species. Corcovado has such an impressive biodiversity partly because it encompasses many different microclimates and types of terrain, but mostly because it is isolated from heavy human impact. Puerto Jimenez is the nearest sizeable town to the park and most people entering the park will probably need to pass through this town.