A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

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

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

Paris' linguistic guide to the international language of, yes, love.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

France's most famous cemetery, with some of its most curious tombs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.

Explore the subjective dream of a hotel.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

Extensive private collection of authentic Medieval devices used for human torture and execution.

Artworks by loners, prisoners and the criminally insane.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

A Swiss board game museum housed inside a picture-perfect castle.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

Museum of science fiction, utopias, and extraordinary journeys of the mind.

A mythically themed self-built sculpture park.

World's largest permanent maze made of 18,000 conifers.