A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Nothing says indulgence like a 1,500-pound chocolate castle.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Nature and art meet in this curvy creation

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

The 10-foot-tall vegetables belong to Michigan’s first food rescue program.

Detroit’s Eastern Market has been transformed into an outdoor museum with colorful murals that address social issues and symbolize the city.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The angel of death appears to weep black tears at this grave marker.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

Take a drunken tour inside the world's largest known geode.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.