The unusual patterns in this rock formation result from two distinct modes of weathering.

The oldest stone house in Paris was built by its most famous alchemist.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

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

The highest rapid transit station in the world.

One of the largest sandsculpture installations in the world, this exhibit boasts a unique combination of sprawling sand scenes, theological musings, and salvaged shipwrecks.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Sniff the Titan Arum's rotting flesh.

Ride the subways of yesteryear.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

Annual technopop celebration of peace and love.

The house that took a plunge into the facade of a museum.

One of the most notable figures in the Wurstelprater’s history is often assumed to be a fictional character.

Royals, rebels, and artists have all conversed at this grand 19th-century Viennese coffee house.

Designed as a reminder of one of the darkest moments in Austrian history.

A gift from Emperor Franz Joseph I to his wife.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

An ornate private entrance to the Vienna subway built specifically for the emperor.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

A magnificent collection of imperial armor and weaponry.