Who needs fancy modern water slides when this giant North Carolina rock works just as well?

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Dramatic river bend surrounds a natural red-rocked pedestal.

Population: 1.

These aggressively sustainable art homes look like something out of 1970's science fiction.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Seller of surplus nuclear research materials.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

See massive fossils that are over 200 million years old in northeastern Arizona.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.