One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

This hotel was used during the Manhattan Project to house official visitors.

The secret city built by the Manhattan Project.

This replica of the Greek structure is in the heart of Nashville.

An ode to "The Queen of Appalachia."

An aptly-named street near the birthplace of the modern LGBT rights movement.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

This video store is a horror buff's dream.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

A statue honoring 44 continuous years of greeting passing ships.

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.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

An idyllic mineral hot springs facility with a more-than checkered past.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

A cannonball from Union forces battling John Hunt Morgan made this church a permanent home.