Manuel Antonio National Park Costa Rica is one of the most beautiful parks in the country, and a must-see for any traveler visiting Costa Rica. The park is renowned for its pristine beaches, coconut palms, rainforest, and an incredible view of the Pacific Ocean. Visitors to Manuel Antonio National Park can spend their days sunbathing, swimming, hiking trails, and spot sloths, three species of monkeys, lizards, and a myriad of colorful birds.