sunset, silhouette, watch, tower, grand canyon, arizona, grand canyon national park, blue, orange, mountains, distance, fading, mountain, timepiece, attenuation, placement, outline, district, column, spacing, american state, state, sundown, weakening, transformation
Sunset seen from the Watchtower area at the South Rim of the Grand Canyon. Blue silhouettes of mountains stack upon each other as they fade into the distance under an orange sky.