Olbia (15m/50ft; pop. 33,000), formerly known as Terranova Pausania, lying at the west end of the deeply indented Gulf of Olbia. A causeway 1.5km/1mi long carrying the road and the railroad which links the town with the little Isola Bianca, where the ships from Civitavecchia come in. Beside the town railroad station is the 11th century church of
San Simplicio, in Pisan style, with a collection of Roman inscriptions (particularly milestones), and a sarcophagus with a decoration of garlands. From the church and from the harbor there are fine views of the bay and the massive offshore island of Tavolara (up to 555m/1,832ft; area 6 sq.km/2.25 sq.mi).