Indeed - in fact I live in a suburb of Lisbon that was just fields maybe 30 years ago - I am continually astonished at the vast scale of reasonable quality high density housing, all with schools, parks, hospitals etc - there must be hundreds of thousands of people here, a miracle of urban planning. Apparently the Lisbon middle classes fled to these new suburbs to get away from their small damp draughty downtown apartments, which ironically have now become so desirable.