The more than 100 billion gallons of precipitation that El Yunque receives annually spawn rushing streams and cascades, outsize impatiens and ferns, and 240 tree species. In the evening, millions of inch-long coquís (tree frogs) begin their calls. El Yunque is also home to the cotorra, Puerto Rico's endangered green parrot, as well as 67 other types of birds.
Need trip ideas? Get inspired by our curated collections of the world's best destinations.More