What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

The first museum in the world devoted to sexual gadgetry.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Historic funicular railway, believed to be the shortest railroad in the world.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Quite simply the largest tree in the world (by volume).

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Most-visited and most-photographed slot canyon in the American Southwest.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This spooky statue sits outside a famous Prague theater.

A wunderkammer of mysterious objects and stories.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Tiny memorials honor individual victims of the Holocaust.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.