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

The Grand Canyon of Texas.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

There’s a hidden military meme engraved on the World War II Memorial.

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The bears may be gone, but their old cages can still be found.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The world's largest piece of copyrighted artwork.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

She become one of the first women to serve in the United States military by secretly dressing like a man.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

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

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

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