Hike through tropical forest wilderness
The El Yunque National Forest is the only tropical rainforest in the US National Park System. The ideal way to see it, should you be up for a challenge, is hiking to the top of El Toro peak, the highest point in the rainforest at 3,533ft above sea level. About four miles round-trip, the trail is much less developed -- and less crowded with tourists -- compared to other trails in the park. The stunning views at the top are well worth what can be a difficult, muddy trek.