There is something fascinating about dams. I love how they are landscaped with camellias and jacarandas, now gnarly with age, and the vista of water that looks like a lake but isn’t really a lake. I get a little mixed up with the dams around Sydney: I can’t ever quite remember which one has the curved wall, which one has the art deco detailing, which one has the picnic area with the view. But I do know that this notice is on the Avon Dam wall, and that I was rather pleased to see that someone had amended the sign.