The first piece of public art dedicated to LGBT rights.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The massive machine creates cracking displays of indoor lightning.

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

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

Impossibly life-like natural history models created out of glass by a father and son.

This hidden labyrinth offers walkers some brief peace of mind.

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

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

A giant donut stands as a popular symbol of Los Angeles iconography.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Don't blink or you'll miss it.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

A clear blue swimming hole with hidden caves, still unexplored.

A serene garden path lined with 36 haiku stamped into clay stones.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

This homegrown adoption center offers a wonderland of feline companionship.