Glacier-fed alpine lakes each have a unique blue formed by the mountains and ice that shaped them. These intense colors hold the memory of “deep time,” geological processes millions of years old. Climate change rapidly accelerates environmental shifts, causing some of these spectacular blues to vanish.

With stunning cinematography, the film immerses viewers in the magnificence of lakes so rare that most have never seen them, pulling us in so that we experience these bodies of water as if we were standing alone on their rocky shores—witnesses to their power and acutely aware of what their loss would mean, both for ourselves and for the Earth.

Filmmaker Leanne Allison’s narration intimately balances J.B. MacKinnon’s eloquent science writing. This short documentary gently asks what it might mean to forget that the ethereal blues of these lakes ever existed.