A bike train runs along a disused railway line through the tranquil French countryside.

A once drab public housing estate is transformed into a colorful gallery of trompe l’oeil murals.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

This Parisian café sticks almost exclusively to an ethos of reuse.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

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

This bridge was constructed from the rubble of the infamous Bastille.

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

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Catacombs turned marketplace.

Pop culture has helped to keep this iconic British building from being destroyed.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Hear the quietest sound from across the dome.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A musical instrument played by the sea.

Aqua white sand highlighted with fiery red rocks.