This first national park of Costa Rica protects both historical sites and tropical dry forest. The Santa Rosa battle was fought here in March 1856, when a group of filibusters commanded by American William Walker were trying to conquer Central America and had entered Costa Rica from Nicaragua.
The Guanacaste National Park, together with the Santa Rosa National Park, forms a mega park of 85,000 hectares that provides migratory routes and shelter for a wide variety of animals.
Palo Verde National Park in Guanacaste comprises over 13,000 hectares (32,123 acres) of marshes, wetlands, lagoons, meandering channels and pools in the lower basin of the Tempisque and Bebedero Rivers.
This national park along the Guanacaste coast was created to protect endangered giant Leatherback turtles, the largest sea turtle in the world.
Initially created as a wildlife refuge in 1991, this area in Guanacaste was declared a national park in 2004 to protect, restore and manage the remaining forests and watersheds in this region south of Santa Cruz.
The Ostional Wildlife Refuge on the Nicoya Peninsula protects the important nesting beaches for Olive Ridley, Leatherback and Pacific Green sea turtles.