All that's left of the quintessential "cabin in the woods."

This museum is a full-size replica of an original church constructed during the 13th-century.

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

A 200-year-old bar is all that remains of one Mississippi River town's rough-and-tumble past.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

Stroll through a wonderland of stupendous moss-covered trees.

Mysterious meeting place for UFO hunters near Area 51.

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

A Gothic cathedral created from volcanic rocks.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

A network of fortifications that never saw conflict.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The most alien-looking place on Earth.

One of the most unusual geological features, recognizable from a dozen hit movies.

An architect transformed this abandoned cement factory into his castle-like workshop.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A collection of old steam and diesel locomotives sitting in a fenced-off garden.

One of the oldest living oak trees in the Southeast.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

More gold than anywhere else, ever.

One of the only places where Earth’s mantle lies above water.