Only one mighty tower reamains of the once proud fortress today. Worth visiting if you find yourself in the area.
Wikipedia https://it.wikipedia.org/wiki/Castello_di_Salvaterra_(Iglesias)
Address Località Castello Salvaterra, 09016 Iglesias, Carbonia-Iglesias, Italy
Coordinates 39°18'53.454" N 8°32'8.784" E