12. Leh-Manali Highway, India
The Leh-Manali Highway is a 300-mile route that cuts through the Indian Himalayas, connecting the towns of Leh and Manali. This road reaches altitudes of over 17,000 feet and passes through some of the most remote and rugged landscapes in the world. The highway is only open during the summer months due to snow and landslides during the winter. The high-altitude conditions, combined with the narrow roads and steep cliffs, make the drive perilous. For those seeking an adventure, the Leh-Manali Highway offers an unforgettable experience, with stunning views of the towering peaks, deep valleys, and remote villages.