Risk Factor: If the monsters don't get you along this highway—the name literally translates to "Troll's Path"—the curves on this road certainly will. The route is known for its 11 hair-raising hairpin turns and steep, 9% gradient. Yet despite the dangers of the one-lane road, it's become a popular tourist attraction, hosting thousands of brave drivers every year before it closes each winter.
Why you might be tempted to drive it anyway: You definitely shouldn't take your eyes off this road while you're driving, but if you do you can catch a glimpse of the impressive Kongen (King), Dronningen (Queen), and Bispen (Bishop) mountains, or stop at the 1,050-foot Stigfossen waterfall.
More From Condé Nast Traveler:
Vegas' Most Expensive Hotel Suites
Must-Try Desserts Around the World
Rooftop Hotel Bars with Incredible Views
Florida's Best White Sand Beaches