The Hobbit filmed at Pelorus River, Havelock. The clear green river the dwarves ride in barrels out of the Woodland Realm. On screen it's The Forest River.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Havelock and it tells you what was shot around you, how to get there, and whether you can actually go in.
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