The world's longest known cave system.

The first declared National Monument in the United States.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

Come for the speed, leave in love with the desert.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

The longest living non-clonal organisms on Earth.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

When ecosystems collide in the arid Southwest.

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

A technicolor place of worship for Elevationists.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The fifth-longest natural arch in the world, and the longest outside China.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A secret climbing tree hides along the side of a Costa Rican road.

Sloth rehabilitation center in the jungle of Costa Rica.

This Costa Rican topiary park is a surreal garden of unearthly delights.