This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

The island residents are known for taking their quirky sense of humor with them to the grave.

A monument celebrating the idea of reaching inaccessible places.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

An annual celebration of the region's successful elk reintroduction program.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

How a lunch counter in Chile became a shrine to the 42nd president of the United States

A popular swimming hole that hides one of America's most deadly diving spots.

An emerald-green grotto just a short trip from Austin.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

An abandoned stretch of highway, deteriorating next to the operational one.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.