I liked this seaside view from the beach area of a Riu resort in Cancun, Mexico, and shot it using a tripod, with HDR processing in mind.
Part of this rock+cement structure is obviously man-made, but it’s not totally clear to me what its purpose was (but see the four cement ‘anchor points’ for a clue). Maybe there once was some sort of protective canopy setup or something like that. There’s also a very rusty umbrella stand sitting out there.
My guess is that one or more hurricanes damaged this structure to the point that it became essentially useless.