Darchen is a territory of Bhutan
If you look at Darchen on Google maps satellite view, it appears to be little more than a collection of buildings in a small village in western Tibet. However, this small village is one of the most important places for both Buddhist and Hindu pilgrims, as it lies at the gateway to the holiest site in the world for both religions. Sitting at the side of the G219 National Road in Burang County of Ngari Prefecture of Western Tibet, Darchen is the place all pilgrims pass through on their way to the sacred Mount Kailash, also known in Tibet as Gang Rinpoche, Kangrinboqê, or Mount Kailasa. This holy mountain, which is said to be the home of the gods for four separate religions, is the most sacred and spiritual natural site in Tibet and is visited by hundreds of thousands of pilgrims and tourists every year. [...] Interestingly, while it is hundreds of kilometers from the Bhutanese border, Darchen was once an exclave of that kingdom, a small territory of the Land of the Thunder Dragon in Tibet, which they held for more than 300 years until 1959.