various old stair sets through here.

watercourse goes underground here (pipes)

Cooper Park, or Fletcher Street Reserve? Both?

The (original) Cultana Training Area is here, it's not exactly clear from imagery exactly where it starts and ends.

See also https://www.energymining.sa.gov.au/industry/minerals-and-mining/communities-and-land-access/mineral-exploration-and-land-access/defence-land/cultana-training-area

sydney water pumping station?

ID this utility infrastructure

VTS tower or just port ops? not signposted

gate. also, stream under road (heading east)

4wd track to keyhole lagoon. gate (open, public access to keyholes from beach). info signs on both sides.