Sydney Harbour itself is the biggest body of water in Sydney.
Sydney Water Management System.
sydney harbor
If it was to the east of Sydney it would be under water
It is on the shore of Sydney harbour
The Tasman Sea is near Sydney, Australia.
Sydney, Australia, sits on an inlet of the Tasman Sea.
because it is more windy in cairdns and not too windy in sydney this is called air pressure
500,000 megalitres
pressure water into doing stuff
A very large pressure cooker and a lot of vinegar, perhaps.Seriously, I'm unaware that the Sydney opera house is any particular need of "preservation."
Pressure is the same whether hot or cold.