I remember alot about growing up in New York City.
I never lived in Manhattan or Brooklyn but I did visit.
One amazing I remember is the sounds and smells.
In Manhattan its always the hussle and bustle of the never ending rat race. I remember the smells of the hot dog vendors and the restaurants drifting out into the streets.
The sounds of cars and honking horns everyday. Sidewalk vendors yelling out at you. Construction going on all the time and sounds of jackhammers and such. You'd walk down a street that was incased in scafeling that you had to walk under. The sound of public buses stopping and starting and braking in their usual way. Manhatan subways were mostly underground. The diversity was amazing. You'd have business people dressed to the tee wearing running shoes to get to work.
Depending on the time of day you rode it might be so packed you barely make it in the door and struggle to fing a pole in the center of the train to hold onto to. You were basically incased in human bodies and the smell of cologne and good old fashioned body order was everywhere. Bagladies and street musicians. I remember the feeling of being a tiny worker ant in a huge jungle of concrete.
Brooklyn had the above ground subways that ran underground depending what part of the city you were going. We had an above ground subway in the part of the city where I grew up and I got used to hearing the train go by and sometimes it would cause vibrations. Also around the time I visited Brooklyn their were complete sections of neighborhoods that were irish or italian or jamaican. it was as if an entire culture flocked within a few square blocks. In the Bronx Arthur Ave was a well known italian neighborhood and others were careful not to venture in that territory.
I could go on for days really about the subway poets and the homeless lady that wore lipstick all over her face, little italy, China town, sitting on the rooftops during yankee games with lawn chairs and beer, Times Square on New years Eve, the sound of clopping horse drawn carriages.
Oh well I don't know if that helped you at all if you had something you specifically wanted to know I could tell you about just let me know.
I'm writing a book too but Good luck on yours!