A series of abstract, silly sculptures represent the works of a great modern classical composer.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

This banal Parisian entranceway is not what it seems.

A subterranean shelter remains intact under a busy Paris railway station.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A giant yellow phallus sculpture hidden in the gardens of the Museum Boijmans Van Beuningen.

The Netherlands' first car tunnel has an unusually rectangular shape.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

An art installation memorializing a tram stop, which became a tram stop.

A modern reimagining of a medieval city gate.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A true Valhalla for cactus and succulent lovers.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

To the great disappointment of doomsdayers, this codex merely contains records of the Moon and Venus.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.