The Soana is a small 24-kilometre (15 mi) torrent of the Province of Turin, Piedmont in north-west Italy, draining a basin of some 214 square kilometres (83 sq mi). Its headwaters are above Pianprato, in Valprato Soana, where a number of smaller torrents converge. It is the principal tributary of the Orco, which it joins at Pont Canavese.
Sovana is a small town in southern Tuscany, Italy, a frazione of Sorano, a comune in the province of Grosseto.
Etruscan by origin, Sovana became a Roman municipium, and, from the 5th century, an episcopal see. Conquered by Lombards in 592-605, it was chosen as their administrative center in the area. Later, when Roselle was abandoned due to Saracen ravages, it became the centre of the county under the Aldobrandeschi family. In the Middle Ages it was known as Soana.
Its importance declined when the county was acquired by the Orsini, who moved the capital to Pitigliano. In the mid-16th century Sovana was annexed to the Grand Duchy of Tuscany by Cosimo I de' Medici.