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

One of the ghostly stops along Route 66.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

An eerie, derelict amusement park in Berlin.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A toxic ghost town sitting atop a massive coal fire.

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

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The best Tiki bar in Las Vegas.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

The secret city built by the Manhattan Project.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

Railroad came. People came. Railroad left. Town died.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This Elizabethan hedge maze is one of only six in North America.

Tour the original street level of Port Angeles, buried underground in 1914.