Model Trains and Much More in Hamburg.

Come stay at a live-in art installation.

An elevator into the Baltic Sea.

This "floating railway" is one of the world's oldest monorail systems.

When the rain falls, this drain system turns into a musical instrument.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This tiny cafe is one of the last meeting places of its kind, allowing revolutionaries a place to plot.

A garden of massive sculptures sits in Jean Lindard's backyard.

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Sleep in a climate-controlled plastic bubble for the night.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

Avant garde house of Pierre Cardin on the Cote d’Azur.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

Two small chapels housed inside an ancient tree.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

Notorious artist squat renovated into legal studios.

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

Record-holding guitar meant to promote country.

Giant fruit signaling the entrance to a tropical paradise.

One of Australia's famed "Big Things," this giant fruit was once stolen as part of a publicity stunt.