A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

This artificial cave looks like something out of a fairytale.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

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

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

A surreal statue honoring Prague's favorite literary son.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This supermarket is suspended 25 feet above an interstate highway.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

A unique columnar residence built in the 19th century.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

A plaque marking the famous abolitionist's birthplace often overlooked by visitors to the nearby Charles Sumner House.

The massive machine creates cracking displays of indoor lightning.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

This doorless 20th-century elevator doesn't stop or slow down.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.