Hana Highway (Maui, Hawaii)

Sixty-four miles, 620 curves, and 59 bridges — 46 of which are one lane. The Road to Hana isn't fast (plan three hours minimum each way), but it packs more waterfalls, black sand beaches, bamboo forests, and dramatic ocean views per mile than any drive on Earth. Stop at Twin Falls for a swim, the Wai'anapanapa black sand beach for photos, and the Haleakala National Park Kipahulu entrance for the Seven Sacred Pools. Motion sickness is part of the experience.