Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

This picturesque abandoned home is rumored to be a spite house.

The hill that gave the Massachusett tribe, and later the state, its name.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

The massive machine creates cracking displays of indoor lightning.

A beautiful Victorian-era cemetery, complete with a miniature village.

A 19th-century smallpox cemetery is being reclaimed by scrub forest and sand dunes.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Stockholm's deepest subway station is also a stunning ecological wonder.

One of the now-less-hidden floral gems of the "Emerald Necklace."

A public urinal so pretty, it was declared a national monument.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

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

Radical Bookstore and Community Space.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.