The habitat of Palo Verde National Park changes with the seasons, spending half the year as a wetland haven and the other half as one of the best examples of tropical dry forest in Costa Rica. The dual nature of this forest is due to the annual flooding of the Tempisque Lake and river system.

During the dryer months the region's lush greenery retreats exposing large patches of limestone, while in the more temperate wet season flocks of migratory birds attract the attention of birdwatchers and scientists alike. Good quality tour guides and the park's location off the well-worn tourist trail make this the ideal spot for nature lovers.