Lake Bolsena is the largest lake in the northern part of the region of Lazio in Italy and the largest volcanic lake in the whole country, having a circumference of 43km. It is known for a strange phenomenon, known locally as “sessa”, which causes tidal-like movements in the lake. Its formation began 370,000 years ago following the collapse of a caldera of the Vulsini volcano, which stayed active until 104 BC. The two islands in the southern part of the lake were formed by underwater eruptions.
By car Lake Bolsena can be easily reached from Rome by taking the Cassia bis road. It can also be reached from the main A1 tollway (Autostrada) that connects Rome and Florence, by exiting at Orvieto.
The towns of the lake are served by buses that depart from the bus station at Viterbo.
Bisentina is an island in Lake Bolsena. It is accessible via a ferry service from Capodimonte. A curiosity is its evergreen oaks. There are also Italian gardens, a couple of churches and a convent. The Malta dei Papi, was a prison for priests found guilty of heresy, created out of a small cave.
Bolsena. The town that gives its name to the lake is now mainly famous for an apparent miracle that occurred in 1263. A consecrated host bled onto a corporal, the small cloth upon which the host and chalice rest during Mass. The appearance of blood was seen as a miracle to affirm the Roman Catholic doctrine of transubstantiation, which states that the bread and wine become the Body and Blood of Christ. The Corporal of Bolsena is now kept at Orvieto cathedral and is venerated because the red spots on the cloth appear to show the profile Jesus Christ.
Capodimonte. Not to be confused with the Capodimonte near Naples that gives its name to the famous porcelain, this Capodimonte has an interesting castle that used to belong to the Farnese family. It was mainly a fishing village.