Site of Roman Catholic pilgrimage founded after a vision of the Virgin Mary appeared in 1480.
The water in the Verzasca is known for how clear it is, you can easily see to the bottom of the river. The Verzasca is fed by glacier water from the alps above which gives it a green or turquoise color. It's also very cold, particularly in spring.
Picture of Lago di Vogorno in the Valle Verzasca in Tessin, Switzerland.