This unassuming retro burger joint was billed as “diner of the future” at the 1939 World's Fair.

A crack flared at the base provides a pathway completely through a sandstone ridge near Moab.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A nude beach alongside a washed-out road.

This lush Florida island is home to the ruins of a crooked ship breaker's tiny empire.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

This 140-year-old beacon off the Florida Keys marks the wreck of a Navy ship that once roamed the Caribbean hunting pirates.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

This nearly abandoned town was once a thriving mining community until a series of fires.

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

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

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This geothermal hot spring hides beneath a slowly growing mineral dome.

A small oasis not far from downtown Moab.

This interpretive path lets you get up close and personal with dinosaur bones.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

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

This small New York museum celebrates the mountainous artwork of a Russian mystic.