The image is a photograph of a sign in a desert-like area. The sign is rectangular in shape and has a white background with black text. On the left side of the sign, there is an illustration of a sandy beach with a small stream running through it. The text on the sign reads "Where Does the Sand Come From? How are the Dunes Formed? Protect this environment. Stay on the boardwalk." 

The illustration shows a sandy dune with a few small shrubs and bushes scattered around. The dune appears to be in the process of being eroded or eroded, as there is a small amount of sand visible on the surface. The water is a light blue color and there are a few rocks and boulders scattered around the dune. The overall mood of the image is peaceful and serene.