Castelsardo is a town and comune in Sardinia, Italy, located in the northwest of the island within the Province of Sassari, at the east end of the Gulf of Asinara.
Wikipedia https://en.wikipedia.org/wiki/Castelsardo
Official Website http://www.comune.castelsardo.ss.it/config/start/
Coordinates 40°54'37.678" N 8°43'5.927" E
