Rippling sand dunes frozen in the Arizona rock.

An emerald-green grotto just a short trip from Austin.

A stockpile of childhood lunch pails turned collectibles.

148 feet long and in the middle of a verdant forest.

Coca Cola may be "the real thing" but its inventor, buried at this Georgia gravesite, called it a "valuable brain tonic."

The largest self-built castle in the U.S., six decades in the making.

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

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

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

Travel through the wholesome amusements of yesteryear at this charming miniature village.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

A man's home is his castle.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

The beauty of urban decay, hiding some dark secrets.

This folk art compound was built by a fortune teller on the advice of three people from the future.

Scattered around Atlanta are little doors with big charm.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

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

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.