It rises at the foot of Mounts Trebulani, at 86 meters above sea level, in the territory of Calvi Risorta.

For the ancients, it was the river of the myth, which gave forgetfulness to whoever drunk its water.

The extinct volcano of Roccamonfina is the heart of the park that protects since 1993 a territory of great naturalistic value from Campania Felix up to the border with Lazio. Eleven thousand hectares of volcanic rocks and limestone, streams and lush vegetation, dotted with ancient hamlets keeping alive the imprint of their past and the heritage of their identities.

With a surface of just over a square kilometer, the enchanting Lake of Letino was created at the beginning of the twentieth century in order to feed the hydroelectric power station of Prata Sannita.

It rises from Lake Matese and in the first part of its way, it is characterised by cascades and differences in heights.

Once known as Lake of Carinola, it is a volcanic lake at the foot of mount Massico, in the municipality of Falciano del Massico.