Welcome sign announcing Haverhill, MA, as the birthplace of horror rocker/artist/director Rob Zombie.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

Siberian husky that delivered a life-saving antitoxin.

Underneath the bustling city streets, a hydroponic farm grows unique herbs in an urban oasis.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Statue commemorating the use of ether in anesthesia.

A mysterious stone embedded at the base of a historic Boston building.

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

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

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

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

The oldest pastificio in Queens offers visitors fresh noodles and a peek inside the macaroni-making magic.

The oldest living organism in New York City. Maybe.

The world’s largest collection of Tiffany glass sits in a warehouse in Queens.

Two New York rooftops are home to the largest rooftop soil farms in the world.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Site of the first pathological and bacteriological research facility in the United States.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

NYC's legendary underground network for bovine transportation.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Unlock the secrets of the conjuring arts.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

The secular incarnation of a religious meditation.

The "father of immunology" used this humble hut to offer the local people some of the world's first free vaccinations.