Isokon Flats (London)

Once home to design icons Walter Gropius, Marcel Breuer, and László Moholy-Nagy and frequented by Barbara Hepworth and Henry Moore. A sample of flats (including the penthouse!) are available to tour during London’s Open House Festival.

There’s also a lovely volunteer-run gallery with rotating exhibits and a thoughtfully curated shop including Isokon furniture. They sometimes offer tours of the minimum flat by donation!