The only tropical rainforest found in the U.S. parks system is this 28,000-acre beauty. Despite its massive size, advanced reservations are
required and hard to snag online, so a guided tour is sometimes your best bet
for access. Plus, the guides know just where to go so you're not wandering around trying to find the best spots.
Tour companies like Island Journeys have multi-hour excursions which include a tropical hike through the
greenery with a natural slide down a waterfall, a 20-foot plunge into a
refreshing mountain stream, plus opportunities to cliff dive and fly like
Tarzan off a rope swing. When you’re done, they provide refreshments in the
form of tropical fruit purchased at a nearby stand.