Lake Peyto (Alberta, Canada) as seen from Bow Summit.
The electric blue of this lake is caused by the sunlight only reflecting back the blues of the "rock flour" that remains suspended in the ice cold water.
The lake is fed by the Peyto Glacier. I visited this exact spot in 1980 and even as a 13 year old girl, I was amazed at how the glacier seemed do close to the lake. Visiting this past summer with my own family, I was shocked at how much smaller the glacier had become.
In the past 100 years the glacier has shrunk by nearly 70%. Most occurring in the last 30 years. Hopefully my daughters will be able to visit this turquoise gem with their own families 30 years from now.