watercolor art of a vibrant oasis in a desert landscape with palm trees and tranquil blue water, concept of nature's

watercolor oasis desert landscape palm nature serenity tropical escape scenic beauty tranquil art trees water vibrant painting relaxation paradise illustration peaceful environment wilderness travel destination lush greenery sand shore getaway exotic retreat picturesque calm foliage reflection sunlit natural adventure purity harmony exploration wanderlust warm idyllic blue concept watercolour aquarelle ai generated