Lake Wildsee, St. Gallen, Switzerland
The Schottensee and the Wildsee lakes are the most eclectic especially with the eminent peaks reflecting in their green-blue shimmering waters. Their colors seem surreal in most pictures - a lot depends when you are traveling and the incidence of light, as the colors dramatically change.
The Wildsee is located in the territory of Mels in the canton of St. Gallen.
To experience the famous 5 lake hike including Wildsee read this blog post - https://swissfamilyfun.com/pizol-5-lake-trail/