Serious question. I live in a very dense neighborhood by North American standards. About 32,000 people per square mile, and it's self contained: people don't have to travel elsewhere to go out, shop, relax, etc. Some leave for work, but a high proportion are here during the day too.
It was built around 1900, and lots of people visit just for the atmosphere.
If we could clone this neighborhood and built it elsewhere, it would be a good thing. But we don't seem to be able to build neighborhoods in this style anymore.
Are there any new developments that are both dense and nice?