This amazing landscape is accessible from the Hasli valley by taking the steepest funicular in Europe with a slope of 106%. You can imagine that's indeed an interesting ride...
There is of course a hiking trail to the lake, it takes about 2 hours to get there and it's somewhat accessible to inexperienced hikers. The most dangerous places are secured by ropes and it is best to avoid this path in the spring when snow-melt streams can block the way.
The dam, constructed in 1929 creates an amazing view in the Swiss Alps. The high mountain cliffs are reflected in the lovely blue water of the artificial lake creating a wonderful fairy-tale landscape.
Gelmersee lake, Switzerland
The Gelmersee furnicular view
The Gelmer dam that forms the lake 
Gelmersee waterfall and the Alps 
