This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The world's longest known cave system.

Home of an evil witch famous within southern folklore.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

If New Orleans is the birthplace of the "cocktail," why does their own museum of cocktail memorabilia beg to differ?

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

A snapshot of the city's fascinating voodoo culture.

World's largest precision optical instrument used to detect Einstein's elusive gravity waves.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.

A humid oasis combines recreation with exploration in a unique underwater cavern.

World's largest magnetic research facility.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Where the embers of the Big Bang were first detected.

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

Huge masonic hall in Philadelphia with lavishly themed rooms.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

An astounding collection of medical specimens, including bits of President Lincoln.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.