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.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A crumbling hospital from the 1850s on Roosevelt Island.

Rippling sand dunes frozen in the Arizona rock.

World's largest collection of serial killer artwork and other macabre exhibits.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A terrific purveyor of natural history objects and curios.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Rows of 19th-century brick ovens used to process coal into coke form the center of a wooded park.

This small turbine mill along Rocky Creek was built in 1928

The headquarters of a pioneering cast iron and cast aluminum cookware company is in ruins, but still standing.

The crumbling remains of the first Black-owned and operated hospital in Kansas City.

One of the few Cold War-era bases with many of its original structures still standing.

Once the extravagant escape of the Ford family, this enigmatic ruin now stands as a haunting reminder of its former glory.

An enormous factory from the late 1800s sits abandoned on Cleveland eastside.

The last remnants of a lakeside airport that was bulldozed overnight by the mayor of Chicago.

Historic seaside park featuring explorable, abandoned military structures.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.