Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The loneliest island in New York.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

From scholastic to sepulchral - now under reconstruction.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A legendary speakeasy bookstore returns from the brink.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

This highest peak in New Mexico is named after an explorer who had a habit of lending his moniker to peaks.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

"...I guess that was your accomplice in the wood chipper?"

This North Carolina store preserves a historic moment in America's movement for racial equality.

The 15-foot-wide, 2-ton pan fries hundreds of chickens once a year.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

The world's largest vertical wind tunnel.

A huge collection of rocks, gems, and crystals.

A celebration of capitalism in Midtown.

Peek through the gates at this oasis from the city, full of Old English charm.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

More gold than anywhere else, ever.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.