A completely round house designed for the Atomic Age.

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

This elaborate towering structure was once famed for its revolutionary height.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

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

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

The Boston square dedicated to the dark poet who was born nearby.

This historic Boston building has gone from personal estate to porn theater and back again.

Dim sum, served in a grand old theater.

This landmark cemetery in Boston was created more than 300 years ago.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Statue commemorating the use of ether in anesthesia.