6. Trollstigen, Norway
Trollstigen, or “The Troll’s Path,” is a serpentine mountain road in Norway, famous for its 11 sharp hairpin bends that wind up the steep cliffs of the Stigfossen waterfall. The road is only open during the summer months due to heavy snow in winter, and even then, it requires careful driving. Despite its dangers, Trollstigen is a popular tourist destination, offering breathtaking views of the surrounding fjords and mountains. The narrowness of the road, combined with its steep gradients, makes it a thrilling yet nerve-wracking experience for drivers.