Alien: Covenant filmed at Potts Hill Reservoir, Sydney. A huge outdoor set of the wrecked Engineer city was built on this former reservoir site in western Sydney. On screen it's Engineer city.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
Planning the trip? The Australia travel atlas covers money, language and getting aroundand everything filmed in Sydney is on one page
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Sydney and it tells you what was shot around you, how to get there, and whether you can actually go in.
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