A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

A science teacher's dream.

A hidden gem full of oddities, curiosities and macabre antiques.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

A walk through the historic city center, under the streets of Seattle.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Nondescript elevator doors open to reveal a stunning, surreal world.

Nikola Tesla's former home contains an homage hidden from plain sight.

A museum dedicated to man's boldest venture.

A chessmaster's dream destination.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Community bookshelf of 25-foot-tall book spines.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

This abandoned prison castle has become an imposing gallery of graffiti art.

An architecturally-focused antique shop.

An abandoned observatory in the middle of the Illinois prairie.

World's second largest particle accelerator, where nature reveals its secrets.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.