Movies filmed in Buttercup Valley, California, USA

There are 4 movies that were filmed in Buttercup Valley, California, USA.
City: Winterhaven State: California Country: United States
Star Wars: Episode VI - Return of the Jedi
(1983)
The Flight of the Phoenix
(1965)
The Three Musketeers
(1933)
From 'Star Wars' to 'Jedi': The Making of a Saga
(1983)