According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Architectureal fantasy quarter of Rome.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Two small chapels housed inside an ancient tree.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

The largest underground church in Europe.

A beautiful and classically designed villa, with an hourly infestation of monsters.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

A surrealist timepiece by the artist of melting clocks.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A museum of carnival attractions where you are invited to ride the rides.

Notorious artist squat renovated into legal studios.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.