Ohe'o Gulch (Seven Sacred Pools)
A staircase of waterfall-fed pools dropping through the Kipahulu district of Haleakala National Park all the way to the sea. Swimming in the pools is prohibited - flash flooding funnels down this gulch with almost no warning and a rockslide closed the pools outright - so treat this as a viewpoint, not a swim stop. The half-mile Kuloa Point Trail loops from the visitor center out over the pools and the ocean cliffs, and the four-mile round-trip Pipiwai Trail climbs past a bamboo forest to 400-foot Waimoku Falls. It is the far end of the Road to Hana, so budget the drive.