For centuries, members of the ancient pagan Kalash tribe were left behind and largely forgotten, shielded from the outside world by the towering, remote mountains of northwest Pakistan. The Kalash consider themselves descendants of Alexander the Great's soldiers, and have lived mostly in isolation since the warrior invaded the region more than 2,300 years ago. The community, which numbers around 4,000 people today, was able to preserve its unique language, religion, and lifestyle.