1 Best Sight in Guanacaste and the Nicoya Peninsula, Costa Rica

Parque Marino del Pacífico

To get an idea of what's swimming under the Gulf of Nicoya, visit this modest aquarium and marine park. You'll see crocodiles, pelicans, sea turtles, and representatives of the deep, including small sharks. Exhibits are both indoors and outdoors, and there's a playground for kids to let off steam.