Lago di Scanno, Natural lake in Sagittario Valley, Abruzzo, Italy.

Lago di Scanno is a mountain lake in the upper Sagittario valley at 922 metres, between Villalago and Scanno, the largest natural lake in Abruzzo. Its opaque teal-green water is bordered by short, steep shores; in a few brief stretches these have been adapted for bathers as artificial beaches of stones. It reaches 30 to 32 metres in depth when full.

The basin formed when a landslide detached from Monte Rava, in the Genzana massif, damming the Tasso stream between 12,820 and 3,000 years ago. The lake bed lies between limestone of Montagna Grande and the marly limestone of Monte Genzana, crossed by the Monte Genzana fault. Since 2017 the lake has been jointly owned by Scanno and Villalago, following a 1910 Royal Decree that removed it from the list of public waters.

The lake lies about three-quarters in Villalago and one-quarter in Scanno, and since 2017 the two municipalities share ownership, as set by the Abruzzo Region under a 1910 Royal Decree that removed the lake from the list of public waters. The shore holds the Church of Madonna del Lago, the Hermitage of San Domenico and the Hermitage of Sant'Egidio.

The lake is easily reached through a southern beach area offering boat rentals, sunshades, and dining options for day visitors. Arriving early, especially on warm days, helps you secure a good spot since the beach can become crowded.

The heart shape is visible from the belvedere of Frattura Nuova, a viewpoint not far from the huge Mount Rava landslide that dammed the Sagittario valley and created the lake. The lake lies about three-quarters in Villalago and one-quarter in Scanno; the two municipalities have shared ownership since 2017.