This Algerian sweet shop serves confections in an eye-popping array of hues.

Notorious artist squat renovated into legal studios.

This massive library holds what was once the largest book collection in the world.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

A surrealist timepiece by the artist of melting clocks.

One of Jeff Koons’s largest sculptures and his first commemorative work.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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

Indents in the pavement are all that remain from a grisly death machine in Paris.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

A letterpress workshop committed to the art of printing, with unique and creative designs.

Dedicated to the history and culture of smoking, this small museum now includes a vape lounge.

A tribute shrine where the Space Invasion street art movement started.

A large portion of this navigable canal runs under Paris's famed boulevards.

The first green space constructed on an elevated viaduct.

Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

Instead of faces, these sculptures have barcodes—statements on societal dehumanization.

A winding path built in secret on the edge of the continent.

The only place in the world where vehicles for an obsolete form of transportation are still built.

This massive redwood tree has a drive-thru tunnel carved out of its trunk.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

The oldest lawn bowling club in the United States.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.