India’s Prime Minister Narendra Modi has opened one of the country’s most ambitious railway projects, which will connect the Kashmir Valley to the vast Indian plains by train for the first time.

Dubbed by the government-operated Indian Railways as one of the most challenging tracks in the world, the 272-kilometre (169-mile) line begins in the garrison city of Udhampur in the Jammu region and runs through Indian-administered Kashmir’s main city of Srinagar. The line ends in Baramulla, a town near the highly militarised Line of Control dividing the Himalayan region between India and Pakistan.