This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

Nearly 200 prehistoric giants lurk among the trees at this theme park.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Secluded springs in the Rio Grande Gorge offer hot bathing beside the haunted ruins of a stagecoach stop.

A waterfall and cave near Arroyo Seco that inspired the writings of D. H. Lawrence, Willa Cather, and Mabel Dodge Luhan.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Hidden in the hills of Western Pennsylvania lies one of the best-kept ghost towns in America that you can legally visit.

Hidden beneath the waters of Lake Michigan rests a perfectly intact ship from the early 1900s.

Six miles off the coast of Key West, a former military transport ship is now one of the largest artificial reefs in the world.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

A historic steam train meanders along one of the most scenic rail routes in Germany's Black Forest.

A small man-controlled waterfall powers an Art Nouveau elevator and is accessed via narrow gauge, solar-powered tramway.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

As lake waters recede, a German village reemerges after more than a hundred years.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.