One of the remotest parts of the world, the Wakhan Valley extends eastward from Badakhshan to the Chinese border.  Trekking in this finger of Afghanistan has been the dream of explorers for centuries, and the region remains one of the most elusive destinations for experienced travelers.  Populated by Ismaili Wakhis and Kirghiz nomads, the Wakhan is famous for the Pamir mountains, its high mountain lakes, the Oxu antelope and the Marco Polo sheep.