Maui’s Road to Hāna is a 64-mile journey through rainforests, waterfalls, black-sand beaches, and dramatic coastal curves. The air tastes different here — cool, damp, and alive with the scent of guava and rainforest greens. Your hands grip the steering wheel a little tighter as you round another hairpin turn, the 600th curve on this ancient highway that ribbons along cliffs where the Pacific crashes hundreds of feet below. This...