Kalalau Trail, Kauai, Hawaii
This trek has all the classic Hawaiian scenery: coastal views, waterfalls, and volcanic rocks. But the sheer 300-foot drop-offs can be intimidating for some, especially those who have read about the trail on Backpacker.com, which highlights the close calls that have occurred on the precarious path. One such incident occurred in 2006, when a man slipped on the trail and fell headfirst down a slope. He was only spared from going over the cliffs when his head smashed into a rock, which stopped his descent. According to the article, "The impact separated his nostrils from his face, but he survived." They should put that quote in the tourism brochures!