This lake is famous for it's stunning colours. AND for how you get there: you take the famous Gelmerbahn up to this lake (see seperate pinpoint about Gelmerbahn) and once you're up there you can do the amazing hike around the lake. (details about the hike are also in a seperate pinpoint)

the lake is a reservoir, that's why there's (a less pretty) wall on one side of the lake.

take a look on their website to find more info about the spot and the surrounding area:

https://www.grimselwelt.ch/