These images are remarkable, because they are evoking the essence of impressionist paintings. They were captured at Lake Balaton, Hungary, in early summer. A sudden rise in water temperature around noon triggered a mass appearance of filamentous blue-green algae. From a photographer’s perspective, the true fascination lay not merely in the abrupt greening of the water, but in the extraordinary reflections. The photos highlight the sunbathing dock stairs, their structure reflected on the algae-covered surface. As the wind picked up the algae vanished from the water’s surface in an instant.