This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An eerie, derelict amusement park in Berlin.

On Japan's Tashirojima Island, cats are king.

An exquisite tunnel of cascading flowers.

Rippling sand dunes frozen in the Arizona rock.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Each spring this woodland floor is carpeted with purplish flowers as far as the eye can see.

The decaying ruins of Wales' first asylum for the mentally ill.

A pagan tradition of draping trees with rags eerily lives on.

Museum about life, death, and cannibalism in the Stone Age.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

A subterranean playground in an abandoned slate mine.

A modern English garden of eccentric beasts, follies, and oddities.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The largest greenhouse in the world is home to over one million types of plants.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

400-year-old garden, restored to beauty.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Eighty million natural history specimens call this gargantuan museum home.

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

The curios of pharmacist and collector Henry Wellcome.