We live pretty close in, in a 50+ year old neighborhood that has held together quite well. By that I mean most of the homes are original and have been refurbished, only a couple have been torn down and new ones built on the lots.
Ditto New York City. The closer to Manhattan you are, the more expensive the real estate. Housing in Astoria (Queens) and Greenpoint (Brooklyn) is more expensive than exurbia or all but the most upscale of suburbs. The poor have basically been pushed to the outskirts of the Bronx or SE Brooklyn, far from the center of things. In this sense, NYC fits the model of Paris (wealthy folks in the center, with the poor in the outskirts.