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.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

A former zoo turned public park, where visitors can hang out in the old animal cages.

According to legend, Bob Dylan sneaks in twice a year to eat dinner with Jack.

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

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

Three prestigious academic collections come together to create a world-class natural history museum.

One of the now-less-hidden floral gems of the "Emerald Necklace."

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

A historic bridge with a lovely acoustic anomaly.

The childhood home of the meat inspector who would become the face of America.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

Unicorns, elephants, and bears, oh my!

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

The bears may be gone, but their old cages can still be found.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

A wunderkammer hidden on the top floor of the Hartford statehouse.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

As state high-points-by-elevation go this spot is one of the lowest, but for years it was also the hardest to climb.