Since the early 20th Century inventors have been bent on finding a way to maximize the space in parking lots, like the hydraulic lifts to stack cars vertically.
Did you know that before the advent of the modern traffic light, there were traffic towers that directed the flow of cars in Manhattan?
How do blimps lift off? There are 25 blimps in operation in the world, 10 of which are in the US. There are 56 pilots in the US certified to fly these.
There are over 15,000 fire alarm call boxes in New York City, but roughly a third of them are out of service. Most of them have been around for over a century.
The Empire State Building is a beacon in the NYC skyline. The lights on the 72nd floor and above give the building its distinguished look from afar
In today's Cities 101, we look into the tanks of liquid nitrogen on NYC streets. Verizon is responsible for them, which keep the phone lines dry.
While sewers were once directly monitored, things are a lot more advanced these days with a remote monitoring system, which the city is looking to expand
Double-lettered subway signage was used in the NYC Subway system by the IND system until 1985, including the AA, BB, CC, EE, GG, HH, JJ, KK, LL, RR, and TT
Cemeteries aren't something we think about every day, but it's definitely an urban planning issue because NYC is simply running out of space for the dead.
There are signs on NYC trains that are available just in case, but aren't actual lines, and the BMT line used to have 16 numbers!