This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The eccentric mansion of one the most popular horror authors of modern times.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

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

The longest navigable underground river in the United States is home to countless blind and albino animals.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Historic funicular railway, believed to be the shortest railroad in the world.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

European castle ruins in an American state park are actually the product of death and grief.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A meditative space out of a fantasy story.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Sniff the Titan Arum's rotting flesh.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Less a museum than a bizarre fantasy world created by artists and engineers.