The 6 million people who visit the Grand Canyon every year are always dazzled by the sights, but most won’t make the long trek to a tiny village tucked into Havasu Canyon, 3,000 feet below.

The 200 residents of Supai, part of the Havasupai Indian Reservation, live with the cathedral-like Wigleeva rock formations and waterfalls in a village so remote that it can only be accessed by foot, helicopter or mule. Thus, the town has no automobiles.

In fact, the U.S. Postal Service delivers food and correspondence to Supai by mule and all delivered mail contains the unique Mule Train postmark. Supai has been referred to as “the most remote community” in the contiguous United States by the U.S. Department of Agriculture.