The Château de Lacoste or La Coste is a ruined castle in the commune of Lacoste in the Vaucluse department in southern France.
Wikipedia https://en.wikipedia.org/wiki/Château_de_Lacoste
Address Chemin du Château, Lacoste 84480, France
Coordinates 43°49'56.596" N 5°16'19.456" E