Bosa is an Italian commune in the province of Oristano in western Sardinia. It is located about two kilometers from the sea in a wide valley on the river Temo and belongs to the association I borghi più belli d'Italia (The most beautiful places in Italy).
The Roman Bosa originally lay further upstream at a hypothetical Phoenician settlement near the church of San Pietro Extramuros. The Roman city prospered thanks to the port of Terrida (Bosa Marina), which the mountain Sa Sea protects from the mistral. At that time, the mouth of the Temo was in front of the Isola Rossa, which was not yet connected to the mainland.
The old town with its street canyons and tall houses is dominated by the castle ruins of the "Castello Malaspina" from the 12th century. The left bank of the Temo line old Gerber houses that are slowly decaying and still waiting for new use. In addition to the alleys, churches and squares of the city, the church "San Pietro Extramuros" of 1073 is worth a look.
Olive groves and vineyards characterize the mountainous surroundings. Malvasia di Bosa is one of the most famous wines of Sardinia.
Near Bosa some of the last griffon vultures of Sardinia can be seen.
On the seafront is the suburb of Bosa Marina, a popular beach on the Sardinian west coast. From here, in the summer as a tourist offer on the railway Macomer-Bosa the narrow-gauge railway "Trenino Verde"