Cascate del Serio, Waterfall in Valbondione, Lombardy, Italy

The Cascate del Serio are a waterfall on the Serio River in the Bergamo Alps, in the territory of Valbondione, upper Val Seriana. They drop 315 metres in three steps of 166, 74 and 75 metres, with the top of the falls at about 1,750 metres above sea level.

The falls were visible year-round until 1931, fed by the Piano del Barbellino and the Trobio glacier. In 1932 the Barbellino dam was completed and held back the water, hiding the falls. From 1969 an agreement between Enel and Valbondione allowed releases, and between 1975 and 1977 maintenance emptied the basin, making the falls visible again.

A local legend tells of a noblewoman at Pian del Barbellino who had a shepherd's fiancée imprisoned in her castle; the girl's weeping turned into streams that swept away castle and lady and cut the falls. The falls appear in the crest of the Comunità Montana della Valle Seriana Superiore and in Luca Guadagnino's 2017 film Call Me by Your Name.

Water flows over the falls only on specific dates each year, so checking the release schedule ahead of time is essential. Getting there requires a mountain hike that takes several hours and sturdy footwear.

During scheduled water releases, visitors watch a massive volume of water suddenly flow all at once from the dam above. This rare event is controlled entirely by people, not by natural weather or seasons.