A former department store turned into a quirky restaurant.

The largest and most well-preserved petroglyph site in the Verde Valley.

A spiritual vortex among the red rocks in Sedona.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This is one really big nut.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

The oldest continuously occupied public building in the United States.

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

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

"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."

A pair of antique trolleys are on display at one of the oldest subway stations in the United States.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

Former home of an abolitionist couple who escaped slavery and established the most active Underground Railroad stop in Boston.

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

Dozens of bronze glove sculptures symbolizing loss and life decorate a busy Cambridge subway station

This massive World War II calculator hearkens back to the days when "computer" was a job title.

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

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

This imperial marble stele was given to Harvard by Chinese alumni in the 1930s.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

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

An alley way dedicated to graffiti and street art is a constantly changing street gallery.