The incredible 808-mile road that connects two of world's largest countries
The road took 16 years to build and its construction is believed to have cost more than a thousand lives.
Roads have been an essential piece of infrastructure for centuries - and some of them are truly colossal in scale.
They allow people and goods to travel across vast stretches of land and can cross even the most brutal terrain.
Amongst perhaps the most ambitious is the winding Karakoram Highway, which connects China and Pakistan.
The 808-mile road runs between Pakistan's Punjab province and China's Xinjiang province.
Construction took 16 years, between 1962 and 1978 and, given the vast efforts needed to build it, it has sometimes been called 'the Eighth Wonder of the World'.
READ MORE: Incredible new city just 12 miles from bustling capital costing £338m to build [LATEST]
The road is amongst the highest paved roads in the world due to the fact it passes, as the name suggests, through the Karakoram Mountains.
The highway runs approximately 376 miles through Gilgit-Baltistan and a further 50 miles through the Punjab province of Pakistan.
Gilgit-Baltistan is part of the larger disputed region of Jammu and Kashmir. Recently, the Supreme Court of Pakistan has stated that while Gilgit-Baltistan has always remained under Pakistan's administrative control, it is still considered part of the disputed state of Jammu and Kashmir.
The area straddles China's Xinjiang region and areas currently under Pakistan's control.
At one point on its route it reaches the height of 15,466ft above sea level - for context Ben Nevis, the highest mountain in the UK, only reaches the heights of 4,411ft.
In such a harsh climate, it is perhaps no surprise that the road can often become blocked for extended periods due to bad weather.
Don't miss...
New £8bn river that’s set to rival the Suez Canal covering 83 miles [LATEST]
Insane £15.6trn plans for incredible 3,100 mile tunnel between UK and America [LATEST]
The UK’s longest mainland tunnel 17 miles long but it's about to be overtaken [LATEST]
In winter heavy snow can shut the highway down, while the monsoon season in July and August can cause landslides that block the road.
These landslides also contributed to the considerable death toll - around 810 Pakistani workers and at least 200 Chinese workers were killed constructing the road.
These days the highway attracts adventurous tourists, but it also sits on faultlines both geological and geopolitical.
It cuts through the 'collision zone' where the Indian and Eurasian tectonic plates meet, and also is considered very sensitive to Pakistan and China due to its proximity to Kashmir, which India and Pakistan dispute ownership of.