Drenched with more than 240 inches of rain a year, El Yunque is a tropical rainforest that is named for the ancient Indian spirit Yuquiyu. Visitors can find hundreds of different animal and plant species. One of the most famous is the tiny Coqui tree frog that sings at night. The rainforest is home to the endangered Puerto Rican Parrot and boa constrictors. (GETTY IMAGES)