Orvieto, fascinating town in Umbria, surrounded by a landscape of fields and vineyards, rises on a plateau of volcanic stuff overlooking the River Tiber, so that the visitor can see it from a distance. Because of its location, because of its Etruscan roots, because of its charming medieval character, and above all because of its celebrated Cathedral which is a gem of Gothic architecture, Orvieto is one of Italy's most unique and interesting cities. Excursion to Bolsena lake.