The Leh-Manali Highway is one of the highest roads in the world. Running between the Indian cities of Leh and Manali, it opens up an inhospitable part of the Himalaya Mountains. Be well prepared before you start, as you will cross several high mountain passes up to 5,325 m (17,470 ft). Many travelers suffer from mountain sickness due to the high altitudes and the low-oxygen air.
The highway was built and maintained by the Indian Army and is capable of supporting the heaviest of their vehicles. The road is the only route to the Ladakh region and is vital to feed military supplies into that sector.