Completed in 1973, this “city within in a city” has 15,372 apartments, around 70,000 rooms and is home to over 45,000 residents, down from 60,000 at its peak. It is the largest cooperative apartment complex ever built. It’s also the world’s largest NORC (Naturally Occurring Retirement Community). The neighborhood is served by three shopping centers, six schools, 15 houses of worship, two newspapers, and a police force. It even has its own Comic-Con. There is everything you could need, which is good because it is a hard place to get to and out of. Residents are optimistic that will soon change as a $2.8 billion retrofitting of an existing Amtrak route along the Hells Gate line will connect the area to Penn Station.