Best known from the opening credits of TV's Fantasy Island, this graceful 53-meter (172-foot) ribbon of whitewater remains one of the island's most accessible cascades. It's best viewed from above: When conditions are just right, a rainbow arcs from the falls' base into the mist. While the pool below can fill to nine meters (30 feet) deep, dives have proven fatal here, so keep your feet planted solidly on the ground . . . and not just any ground! The county advises against hiking the steep and often muddy trail to the bottom.