Remote, volcanic island that Darwin, Hooker, and the Royal Navy shaped into a thriving, artificial ecosystem.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

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

Yale University's home for rare works, including the mysterious Voynich Manuscript.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

The first declared National Monument in the United States.

The ghost town that ended up on Ebay.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The final resting place and once home of the Bandit Queen of the West.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

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

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

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