I recommend visiting - Corcovado & Osa Peninsula, Costa Rica
Well away from Costa Rica’s better-known national parks, the Osa Peninsula is one of the nation’s best kept secrets. This remote region is home to 2.5% of the world’s biodiversity yet attracts few tourists; there’s a far greater chance of stumbling across hidden waterfalls along the hiking trails than there is of bumping into fellow hikers. The black sand beaches are a great base to spot turtles and humpback whales, while up the cliffs in the rainforest you’ll soon find that toucan, macaw and sloth sightings have become a regular part of your daily routine.