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

The "Seinfeld" diner.

A very classy 1920s-era bar right in Grand Central Station.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The oldest surviving synagogue in New York City is now a soaring art space.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

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

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

A legendary speakeasy bookstore returns from the brink.

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

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

One of only two commuter aerial tramways in the United States.

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

Become a prohibition rebel.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A hip bar decorated with walls of golden skulls.

A semi-scholarly approach to sex.

Try not to get slimed in Tribeca.

A terrific purveyor of natural history objects and curios.

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

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Outsider Art Community.