Tank Stream

The [Tank Stream](https://archives.cityofsydney.nsw.gov.au/nodes/view/1982569) was Sydney's first dependable freshwater source, rising near present-day Hyde Park and flowing north to Sydney Cove. Polluted and progressively enclosed in the 19th century, it now survives as a buried drainage channel beneath the CBD.

Hyde Park to Circular Quay, Sydney, NSW, Australia