Though one of the smallest park in the country, Manuel Antonio National Park is the most popular - and rightfully so.

Manuel Antonio is often considered among the most biodiverse parks in the world. Spanning several natural habits, this gem boasts more than 109 different species of mammals and 184 species of birds.

You can spot the white-faced and howler monkeys, two-toed sloths and the endangered squirrel monkey. Its four beaches cater to snorkeling, swimming and sun bathing. For hikers, there are plenty of well marked trails to explore all the flora and fauna. Manuel Antonio National Park is open Tuesday through Sunday from 7:30 a.m. to 4 p.m.