Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A brutalist gem towering over the heart of Milan.

The most loyal of little dogs, or a Victorian era publicity stunt?

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

The curios of pharmacist and collector Henry Wellcome.

The pockmarks across the building's facade are remnants of the Blitz.

The commemorative stone column conceals a secret laboratory.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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

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

This cheese shop also houses a museum devoted to Dutch dairy.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Model Trains and Much More in Hamburg.

Go surfing on this urban wave, "hacked" by local surfers.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

A tribute to the truly loyal dog who waited outside a hospital for his owner to come back.

An abandoned gun-funded 19th century utopia.

This Connecticut chapel is a starkly modern, and surprisingly colorful, architectural rebel.

The oldest place in Hartford is a cemetery with thousands of bodies stacked beneath the grass.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

This sculpture commemorates the first instance of an American president pardoning a turkey.