It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

These whimsical works of art tell the story of the city's past and present.

This candy-colored storybook village originated as a 19th-century Methodist campground.

Historic Hull Street was actually the first street with a proper name in the Boston area.

Resonating tubes make music from highway overpass.

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

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

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

A historic bridge with a lovely acoustic anomaly.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

35,000 grape hyacinths flow like water down a garden hill.

Radical Bookstore and Community Space.

Three prestigious academic collections come together to create a world-class natural history museum.

Friction between grains of sand cause a curious "singing" sound.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

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

An eccentric inventor's castle home with its own indoor weather system.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

This small, unassuming street is now a canvas for color and creativity.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

This curiosity shop contains a museum filled with bizarre, unique objects.