Gigerwaldsee
Gigerwaldsee is a reservoir in the Calfeisental valley, located in the municipality of Pfäfers, Canton of St. Gallen, Switzerland. The reservoir has a volume of 35.6 million m³ and covers a surface area of.
The reservoir was formed by the arch dam Gigerwald, which was completed in 1976, standing at a height of 147 m.