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

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

A CT scan revealed the identity of this 3,000-year-old mummy that everyone erroneously thought was female.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

Millions of numbers carved in glass represent the tattoos forced upon victims.

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

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

This impressive Boston holy house is the American mecca for Christian scientists.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

Statue commemorating the use of ether in anesthesia.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A men’s restroom became a sandwich shop.

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