This cloud photograph really looks like a famous All Terrain Armoured Transport (AT-AT) walker from Star Wars V - The Empire Strikes Back. Walkers are vehicles that traverse the landscape on mechanical legs. They are used by the Old Republic and the Galactic Empire for ground assault or transport. Throughout the saga, walkers have played a pivotal role in the fate of characters and the outcome of battles. Industrial Light and Magic (ILS) is responsible for their animation and design, often using models, stop-motion animation, and relevant matte paintings to depict their presence in the films.
Let's hope ILS is not responsible for this beautiful photo!