The world's largest rotating world.

This mysterious hill seems to pull objects uphill.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

This mouldering abandoned mental hospital was once a center for progressive healing.

The only surviving prototype for Buckminster Fuller's house of the future.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

Medical history museum featuring a lovely doctor's office from the 1800s.

Twenty churches beautifully painted by 19th-century Czech and German immigrants in Texas.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

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 recently abandoned psych ward at the end of Sanatorium Road.

Ruins of a once-opulent grand Victorian resort.

America's first public mental health facility.

This historic mansion was built as a symbol of love between a husband and wife.

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

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

America's post-nuclear-attack chambers of Congress.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

A health museum containing a 27’’½-foot intestine.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

The first spinning jail built in the United States is the only one that still turns.