Chiusi is located in the Province of Siena, where Val di Chiana borders Umbria. It is considered one of the most antique Etruscan city and today it is an archaeological centre of great importance. The National Archaeological Etruscan Museum exposes numerous finds unique in the world, which have been discovered under the city and in its surroundings. Among the many things to see, we suggest the labyrinth of King Porsenna, consisting in several underground tunnels extending underneath the city.