These fantastically named natural pools look like something out of a Scottish myth.

An eerie, derelict amusement park in Berlin.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A 140-year-old castle with underground caves hidden in San Francisco.

Medicinal spa created with the discharge from a geothermal energy plant.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

An exquisite tunnel of cascading flowers.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The highest point in Montana is as rugged and singular as the state itself.

This giant meditative chakra sits peacefully in the Flathead Valley of western Montana.

New fungal and bacterial species call this deadly lake home.

The old fire tower is one of the last of its kind in the United States.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

A little-visited ghost town state park offers a glimpse into Montana’s "Silver Queen."

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

Mining town from the late 1890s, once home to Calamity Jane.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.