Trollstigen (Norway)

Trollstigen's 11 hairpins carved into a near-vertical mountainside in western Norway deliver a more concentrated thrill than #5 Furka Pass, with a 9% gradient and lanes barely wide enough for a single bus. Stigfossen waterfall drops 1,050 feet beside the road, spraying mist across the pavement at tightest turns. Open only late May to October, this engineering defiance—a road that has no business existing—challenges drivers with relentless tight corners and a vertigo-inducing viewing platform that reveals the entire snaking route below.