concrete pier extending into the ocean under a cloudy sky

concrete pier extending into the ocean under a cloudy sky. A row of red and white barriers lines the edge of the pier, separating it from a rocky embankment and the water. Green rectangular markings are spaced along the pier's surface. A green structure stands at the far end of the pier. A red structure is visible in the distance, beyond the pier. The location is Allende, Mexico, inferred from the description provided. No people are visible.