Greenwich, Sydney, NSW, Australia
The Sydney suburb of Greenwich, in the city's 'Lower North Shore' area. Originally home to the Cammeraygal clan of the Guringai people, the current name is from the English town (as are nearby Putney, Woolwich and Henley - the entire area was often referred to as the 'Thames of the Antipodes').
European land grants began in 1794, with convict Samuel Lightfoot being one of the first.
This area is Manns Point - named for Civil Engineer Gother Kerr Mann. Mann is best known for his work on nearby Cockatoo Island (particularly the superb Fitzroy Graving Dock).
The memorial commemorates the construction of the first tunnel under Sydney Harbour, 1913-1924. The tunnel carried various electricity and communications cables between Manns Point and Long Nose Point in Balmain - a distance of 1,760'.
Constructed primarily to power trams in the city's north; as technology improved, the cables were no longer required. The tunnel was flooded in 1930.