8. Hana Highway, Hawaii, USA
Constructed: 1910
Risk Factor: Sharp blind turns and one-way roads cause frequent accidents
The Road to Hana, as it’s nicknamed, is paved with a lot of dangerous, sharp turns and one-way roads. The Hana Highway is part of Hawaii Route 36 and Hawaii Route 360, connecting Kahului to East Maui. Hana Highway travels through lush, tropical rainforests, and it contains approximately 620 curves, so don’t put on your cruise control.
Hana Highway, Hawaii, USA shutterstock.com
Many of the steel and concrete bridges on the highway date back to more than a century ago, in 1910, though they’re still in use. One TripAdvisor reviewer summed up the danger of Hana Highway, explaining that it takes seven hours to traverse, and there are “sharp, blind turns” around every corner, as well as sections of the road that are too narrow for two cars to pass through.