Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A lush indoor jungle fills this bustling Madrid transportation hub.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

This Funeral Hearse Museum represents the finest in cadaver transportation.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

A curious collection of locks and keys.

This demon atop the Notre-Dame de Paris looks utterly bored.

A charming flea market shop dedicated to retrofuturistic apparati.

An antique curios dealer and hybrid taxidermist.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

Inside a former cabaret, seven floors of erotic art.

The largest medical and anatomical collection in France lies hidden from the public.

The storefront of a ramshackle Parisian puppet theater.