Supai, Arizona

Supai, the most isolated community in the lower 48 states, is one of the car-free destinations in the US for a getaway. It is quite a distance to travel. Everybody and everything must travel the eight-mile distance on foot or by mule from Hualapai Hilltop at the rim of the Grand Canyon to Supai, which has been the home of the Havasu Baaja for 1,000 years (the US Postal Service even delivers mail by mule). A helicopter can also be brought down. The community is renowned for the stunning, year-round Havasupai waterfalls, which are blue-green in color. Visitors can camp under the stars and enjoy a refreshing swim in the Havasu Creek, a branch of the Colorado River.

In the Grand Canyon's Coconino County, Arizona, United States, Supai is a census-designated place. There were 208 people living in the CDP as of the 2010 census. Supai, the seat of the Havasupai Indian Reservation, is the only location in the country where mail is still delivered by mules.

Location: Coconino County, Arizona