This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

Haven for steampunks.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The former hotel where Tesla invented the radio.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

An artist's cute bronze subway sculptures belie his violent artistic past.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

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

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A semi-scholarly approach to sex.

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

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

This turn of the century masterpiece has a mysterious goaty interloper.

A modern mechanical planetary system, part of a 10,000 year clock.