Located along the Panama border, Costa Rica's La Amistad National Park lies shrouded in clouds in this undated photo.

On recent expeditions here, a team led by Alex Monro of the Natural History Museum in London discovered three "new" species of salamanders in the remote cloud forest, it was announced January 4, 2008.

The salamanders were among 5,300 plant, insect, and amphibian species recorded during three expeditions to the forest.

The roughly 490,000-acre (198,000-hectare) UN World Heritage site climbs to elevations of more than 11,000 feet (3,350 meters). La Amistad is Central America's biggest rain forest reserve, and much of it is completely unstudied, Monro said.

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