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

A huge musical instrument played by the ocean.

One of the best collections of wax anatomical models in the world.

Macabre museum devoted to historical Viennese murders.

The final resting place for the remains of 143 Habsburg royalty.

A museum within a museum, devoted to history's most questionable medical devices.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A crumbling hospital from the 1850s on Roosevelt Island.

A cemetery housing wild west legends in South Dakota.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

A plaque marking the famous abolitionist's birthplace often overlooked by visitors to the nearby Charles Sumner House.

One of the indelible moments of the American Revolution took place at this location.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

Narrowest house in Boston.

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

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

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

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

"May prick nor purse ne'er fail you."