No one knows how many bodies are in this vault in a Chicago public park.

Huge abstract sculptures of the Puerto Rican Flag.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

First planned industrial community in the United States.

On the site of a former Army ammunition plant, bison now roam a restored sea of grass.

Hundreds of fiberglass structures line the side of the road in the middle of nowhere.

This horror movie and monster shop is like if a haunted house was a retail store.

Experience the pivotal Civil War battle at this interactive museum.

Remember and reflect at this 9/11 memorial site.

Nature's biggest mammal swims in landlocked Oklahoma.

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.

A mini Wrigley Field for mini baseball players.

The multinational Burger King chain is banned from operating within 20 miles of a family restaurant filed under the same name.

Buy a token from the liquor store and you can make this beast spew flames on command.

This diner serves Route 66 nostalgia and what it claims is the 'original' hot dog on a stick.

A giant wooden statue of one of the greatest pitchers in 19th-century baseball.

The world's third-largest scale model of the planets.

For decades, this waterfall remained hidden because of an artificial dam.

A comprehensive archive of Hallmark Holiday ornaments.

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

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.