Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

In which a local geological marvel becomes a quaint roadside attraction.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A safe space and resource for anything and everything relating to sex and sexuality.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

A virtually untouched "home on the hill" for the flora and fauna of Rhode Island.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

A railroad magnate's replica village has become home to a genetic seed bank for rare breeds of livestock.

The home of the artist credited with introducing the tomato to the American diet.

The final resting place of New England's last "vampire."

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Notorious artist squat renovated into legal studios.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A hands-on traveling collection of the innovative devices of yesteryear.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A psychedelic labyrinth on the San Francisco bay.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

A mysterious artist-run cabinet of curiosities and library.