The largest earthwork effigy in the world.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

The small cave that housed Tennessee's "first citizen."

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

The first full-scale tunnel built in America is short but scenic.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

You were once able to challenge a chicken to tic-tac-toe at this park, which is now converted into the Aikman Wildlife Adventure.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

An abandoned theme park with a strange and tumultuous past.

Prehistoric animals decorate this popular outdoor park.

World's largest collection of Coke-related items not held by the Coca-Cola company.

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

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

The world's longest known cave system.

A subterranean haunt where wine and homemade biscottis are always on the menu.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

The remains of this visionary community can still be found much as it was a century ago.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

A humble homemade ride attracts visitors from around the globe to this small Midwestern town.

Home of an evil witch famous within southern folklore.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.