If you're planning a bit of sightseeing during your trip, head to Torre del Porticciolo— just one of the landmarks located 9 mi (14.5 km) from central Alghero. Hotels.com travelers also say the area is relaxing and has lots of nice beaches.
Why not spend a lazy afternoon at Spiaggia di Lampianu during your trip to Sassari? Make time to visit the monuments and cathedral while you're in the area.