Sydney's most famous architect, Harry Seidler, designed this modest 50-sq-metre house (1950) for his mother and father, Rose and Max. It’s a modernist gem, with free-flowing open spaces, retro colour schemes and hip furnishings. Every year the Historic Houses Trust holds a Fifties Fair (usually in August) on the grounds.
The house is around 30km north of the city and a fair hike from Wahroonga train station (approximately 40 minutes and 3km) − the bus gets closer but you’re better off with your own wheels.