Barbican Centre is obvious but walk the whole estate. Residential towers and walkways create this concrete city in the sky. Chamberlin, Powell and Bon designed it as one massive complex.

National Theatre on South Bank — Denys Lasdun's three theatres in raw concrete with terraced levels. The fly towers and geometric forms are incredible.

Trellick Tower in North Kensington. Ernő Goldfinger's 31-storey tower with that distinctive service tower connected by bridges. Originally social housing, now trendy flats.