The first American department store, and home to the largest operating musical instrument in the world.

A scenic overlook of a pit mine hundreds of meters deep filled with blue water.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

From lefty Jewish gathering site to hip cultural site in just 80 years.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

Two adjoining collections of 19th-20th century physics apparatuses and instruments.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Mysterious rocks that ring musically when struck.

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

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

Where the embers of the Big Bang were first detected.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

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

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

The last slot car racing arcade in Brooklyn is keeping the dream of speedy little autos alive.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

Love, knishes, and best wishes from this legendary Lower East Side bakery.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

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

New York's oldest magic store.