The Great Trail of Orvieto (GAO) is a challenging trek; its 160 km have been divided into 11 sections that can either be covered on foot, on horseback or on a mountain bike. It has been designed to allow hikers to fully enjoy all the tourist, natural and cultural features of the area around Orvieto. Each section can be further subdivided into shorter hikes, so that hikers may enjoy the many accommodating facilities available in this district. This trail does not require any particular hiking skills, as there are not any high drops or rises; it does not arise to any orientation problems, thanks to the clear signposts on the ground. The trail starts and ends in Orvieto, the Etruscan "old city", whose well-known Cathedral and many other archaeological and historical riches attract a lot of tourists every year. Going anti-clockwise, the Great Trail of Orvieto reaches all the most interesting cities and hamlets, where visitors can enjoy cultural riches, as well as handicrafts and wine-and-food delicacies: Castel S. Giorgio, Castel Viscardo, Allerona, Monte Rubiaglio, Fabro, Monteleone d'Orvieto, Montegabbione, Castel di Fiori, Montegiove, San Vito in Monte, San Venanzo, Ospedaletto, Prodo and Corbara. This district is also rich in natural and environmental treasures: the Selva of Meana, a number of gullies and ravines (such as in the area of Prodo), the Volcanologic Park of S. Venanzo and Corbara Lake.