Ansel Adams captured this phenomenal image of Unicorn Peak, Thunderclouds with his medium format camera in late spring 1967. He was sixty-five at the time, and was hiking across Tuolumne Meadows with his Hasselblad when he discovered this view. At the time, heavy snow still swathed the granite peaks of the Cathedral Range south of Tuolumne Meadows. Quite unusual for this time of year, the billowing thunderclouds piled high above the peak indicate that Ansel must have taken the photograph on an exceptionally hot day with heat creating massive evaporation to form the clouds. Beneath this epic cloud formation sits Unicorn Peak, swooping upwards to touch the weathered sky. Adams referred to peaks such as this in the Sierra Nevada as 'sculptures of stone.'