Arguably the "crown jewel" of Central America, Costa Rica has myriad of national parks to choose from, untouched beaches and adrenaline-pumping adventures (zip-lining, anyone?). The country's central Pacific region is among the most visited, as it's home to the fun beachtown of Montezuma and the popular Manuel Antonio National Park. Here you'll see families of Capuchin monkeys hanging out above your head as you walk to any of the pristine surf spots along the coast.