The face of the famed flier in a hillside in her hometown.

The first home of the doomed aviatrix Amelia Earhart.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

The quirky collection includes treasures like Elvis' underwear, Bob Barker's toothbrush, and hundreds of sock monkeys.

Lone survivor from Custer's Last Stand forever preserved.

The world's last remaining store of its kind.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

Go take a picture with the inventor of the daguerreotype photographic process.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Decades before the scandal, this staircase on the river was a literal "water gate."

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

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

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

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.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The "lovely red Vega" of the legendary record-settling pilot.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.