Potters Bar United Kingdom Charles Holden’s mini masterpiece, a marriage of Scandinavian modernism and British Arts and Crafts.

Ealing Broadway United Kingdom Factories of the Great West Road, Brentford. The “Golden Mile”, featuring fantastical art deco factories by Wallis, Gilbert & Partners and others.

Ealing Broadway United Kingdom The Warren Estate, Stanmore. A well preserved group of modernist houses at the end of the Jubilee line in Stanmore, the definition of modernism in metro-land.

Ealing Broadway United Kingdom Lady Bankes School, Ruislip. The best work of the pioneering Middlesex County Council architect department, using Dutch-inspired modernist design.

Diocese of London United Kingdom Walthamstow Town Hall. A grandiose civic centre, proclaiming the confidence of the new Municipal Boroughs and District Councils of the 1930s.

London United Kingdom Stockwell Bus Garage. The cathedral of bus garages, designed by Adie, Button and Partners in 1952 to accommodate 200 buses under soaring concrete.

London United Kingdom The Isokon Building, Belsize Park. A machine for living in, designed by Wells Coates and home to a host of artists, designers and writers.

Diocese of London United Kingdom St Pauls, Bow Common. East end, brutalist-style church by Maguire and Murray, voted by Britain's best modern church in 2013.

Diocese of London United Kingdom Balfron Tower, Poplar. The centerpiece of the Brownfield Estate, designed by Erno Goldfinger, and lightning rod in the debate over social housing and gentrification.

Diocese of London United Kingdom Crystal Palace National Recreation Centre. Sports complex featuring an athletics stadium, swimming pools, squash courts and an outdoor music venue.