When I've lived in a dense city, there have always been large natural areas within walking distance. The ideal is something like 1/2 of the land as lots, 1/3 as

When I've lived in a dense city, there have always been large natural areas within walking distance. The ideal is something like 1/2 of the land as lots, 1/3 as parks, and 1/6 for streets and other paved areas. "Parks" includes both developed urban parks and larger forested/coastal areas with wide walking trails. The trade-off is that there is not much space for ground-level parking, and most people commuting from outside the city must use public transport.