A giant sculpture head with an optical illusion dedicated to the longtime conductor of the Boston Pops.

Narrowest house in Boston.

The remains of a ruined mansion memorialize the 1906 earthquake.

Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The head of a legendary lumberjack watches over a river in Maine.

Created by a local artist, these quirky sculptures each have their own names and personalities.

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

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

A mysterious stone embedded at the base of a historic Boston building.

An enormous, inside-out glass globe built in 1935.

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

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

Nature and art meet in this curvy creation

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

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

Shelves covered in dozens of coffee bean varieties fill this North End institution.

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.