A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

More gold than anywhere else, ever.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This collection of grinning ephemera has grown from basement to Brooklyn.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

Seven golden statues rise into the sky from sculptor Victor Victori's New Jersey front lawn.

Series of storm drains connected to a dark urban legend.

A world-class collection of mechanical musical instruments and automata.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

One of the world's largest model railroads is a mind-boggling achievement.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

A man in a plane delivers Christmas packages to lighthouses.

Massachusetts memorial to murder victim Elizabeth Short near the spot where she was born.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

An eccentric inventor's castle home with its own indoor weather system.

Friction between grains of sand cause a curious "singing" sound.

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

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.