A unique geological area spiked with wind-carved rocks that resemble teepees.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A new kind of theme park for adults off the Las Vegas Strip.

The largest source of fossilized insects anywhere.

When ecosystems collide in the arid Southwest.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A picture-perfect town, perfect for blowing up.

The cinder cone volcano with a less than complimentary name.

Dig for your own trilobites in this goldmine of invertebrates.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Largest collection of mounted dinosaur specimens in the world.

The smallest country in the world.

Towering basalt columns, a creation of fire and ice.

The first declared National Monument in the United States.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A historic covered bridge, only one of two remaining in North Carolina.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.