What is "bannalpsee"

Bannalpsee is a reservoir in the municipality of Wolfenschiessen in the Swiss canton of Nidwalden.

The reservoirs's surface area is . The construction of the reservoir was decided in 1934 and completed in 1937. The reservoir is operated by Elektrizitätswerk Nidwalden.

The lake can be reached by a cable car from Oberrickenbach, which in turn is linked by post bus service to Wolfenschiessen station on the Luzern–Stans–Engelberg railway line.