This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

The famous winding walk at Chartres is surrounded in mystery and myth.

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

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The celebrated eyesore created by starry-eyed sweethearts.

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

Notorious artist squat renovated into legal studios.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The modern birthplace of Irish freedom.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

This elaborate towering structure was once famed for its revolutionary height.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.