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

The oldest garden in Prague, once part of an medieval orchard.

Tragedy on Little Brewster Island memorialized.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

"Mock all and sundry things, but leave the saints alone."

This landmark cemetery in Boston was created more than 300 years ago.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

The Boston square dedicated to the dark poet who was born nearby.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

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

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.