The seamy, underground secrets of Portland's criminal past.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The stately remains of Llywelyn the Great's mighty fortress.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Protecting the dead from opportunistic body snatchers.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

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

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Staves, storm-calling, and of course, necropants.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

Abandoned silver mine strewn with wrecked and twisted structures.

Victorian "Fancy Craft" Hair Wreaths and Relics.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.