One of the reasons the first fleet decided to set up camp in Sydney Cove was because of the fresh water.
A small stream called “The Tank Stream” flowed into the harbour near where they landed.
Today it’s covered over by roads, railway lines, wharves and 200 years of other city “stuff”.
But if you look closley on the pavement at the top of Pitt Street near Circular Quay, you can see this marker which shows where the stream flows.
And if you’re lucky enough, you can be one of the few tourists who gets to do an underground tour of what’s left of the stream.
Look up “Tank Stream” on wikipedia of you’re interested.
It’s amazing what history lies under our feet, waiting to be rediscovered.