Vienna, Austria, has fairly high standards regarding social housing. Especially the architect Harry Glück has raised the bar for high density apartment towers: each flat is connected with a private open space - a terrace.
The Residential-Park Alt–Erlaa is an impressive built example for the "green-city". The project consists of 3.500 units in four 70m high towers, each with a roof-top outdoor pool, connected by a mall providing sport and shopping facilities.
Since a couple of years the site even has its own subway station: Alt-Erlaa.