Site of a former hidden treehouse in New Orleans.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The world's only museum devoted to the wonders of fluorescence.

This structure among the trees was the result of divine inspiration.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Monasteries on rock pillars, once accessible only by frayed ropes.

Two stunning 17th-century libraries and a cabinet of curiosities.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

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

Mysterious rocks that ring musically when struck.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Thousands of well-dressed mummies below a monastery.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

An enormous, inside-out glass globe built in 1935.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

Enormous lake at the bottom of a unique cave system.

A trash dump made beautiful by nature's power.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Odd outsider art installations surround a Gold Rush-era ghost town.

An Australian lake whose pink hue defies scientific explanation.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.