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

Three prestigious academic collections come together to create a world-class natural history museum.

Impossibly life-like natural history models created out of glass by a father and son.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The famous author's cottage hideaway.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

The Cadillac Ranch for monster truck aficionados.

There’s a hidden military meme engraved on the World War II Memorial.

America's post-nuclear-attack chambers of Congress.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

One of only two remaining Victorian-era greenhouses in New York.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

The oddly shaped, steam-spewing building is now an art studio and gallery.

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