The northeastern end of Afghanistan is the mysterious high mountain ranges known as the “Roof of the World”. Pamir mountains, at elevation of beyond 4,000 meter, was part of the ancient Silk Road and was visited by Marco Polo, who described that due to its extreme height no birds can fly beyond, and due to its extreme coldness fire cannot flame. Snow may come anytime here, including the warmest summer months. Pamir is now inhabited by the nomadic Kirghiz tribes. They migrate four times in a year with their portable yurt.
Pamir, Wakhan Corridor, Afghanistan, 2008