This tower commemorates the spot where George Washington hoisted the Grand Union flag.

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

This small shop walked so America could run on Dunkin'.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

This giant temperature attraction created some giant electric bills.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

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

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

The world's smallest drawbridge.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Concrete strongholds stand guard over the Golden Gate.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

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

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

A tiny monument to the classic American candy.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

This supermarket is suspended 25 feet above an interstate highway.

This 50-foot rock formation looked like a face that was once believed to be that of a Native American chief.

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

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."