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.

An abandoned train station in Munich constructed for the 1972 Olympic games.

Retirement home for giant obsolete machines.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

A former ironworks that was the first UNESCO industrial site.

This former steel and coal plant is now a neon-lit industrial fantasia.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

A quaint Russian village in the middle of a German metropolis.

Terrifying derelict military hospital once housed a recuperating Hitler.