Glacial erratic or man-made dolmen? It probably wasn't druids.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

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

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Alexander Hamilton’s creation caused quite a bit of controversy.

A forsaken wonder in the middle of the East Side neighborhood.

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

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

This monument pays tribute to the city’s contribution to basketball history.

An upstate New York garage advertises its services by literally putting the automobile above all else.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

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

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

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

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

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

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

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

Shelves covered in dozens of coffee bean varieties fill this North End institution.

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

Narrowest house in Boston.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The site of Paul Revere's historic two lantern warning.