The image is a photograph of a sign on a sandy beach. The sign is rectangular in shape and has a wooden frame. The background of the sign is a light beige color. On the top left corner, there is a text that reads "DUNAS" which translates to "Dunes" in English. Below the text, there are illustrations of various plants and trees, including a sun, a tree, and a bird. The text on the sign reads "UM TESOURO A CUIDAR" which is Portuguese for "C.P.S.F.S." in English, and below that, it reads "ALERTA" in Portuguese.

The sign also has a small illustration of a boat on the bottom right corner. The boat is yellow and appears to be sailing on a body of water. The water is blue and there are waves crashing against the shore. The sky is blue with a few clouds, and the sun is shining brightly. The beach is surrounded by trees and shrubs, and there is grass and bushes in the background.