The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Set sail on a small scale.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

A tomb in the shape of a traditional Mexican hat and shawl for the father of modern rancheras.

Meat and seafood are part of the frozen dessert flavors available at these legendary street stands.

A sapling of the legendary tree where conquistador Hernán Cortés sat and wept after an Aztec uprising.

The rare American Civil War-era weapon was never fired in anger.

Inside this Krakow church, an explosion of psychedelic color.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Countless grotesque faces stare out from this eerie Prague art wall.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A series of playful yellow penguins share a serious message about the environment.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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