About 45 minutes from San Juan, is the El Yunque Rain Forest. There a number of bus tours that pick you up and return you to where you staying in San Juan. The stops included a waterfall (see above) a tower with a amazing views of Puerto Rico, and hike around the forest in a number of paved and some unpaved hiking paths. Ironically, it was no raining in the rain forest when I visited there yesterday. That rain waited until I was on the beaches of San Juan!