The well on the beach is a bit of a mystery to me. Daughter and I got a water sample some time back to analyse the salt content. Bottle still sitting on the shelf not done.
Could be a simple man made circular hole in the sandstone around a natural spring. Or it could be something mining related?? A drainage adit seems unlikely due to the lack of land elevation, plus it is below the high water mark.
A variation of the above not impossible but I doubt it, it would require a pump to work at Wellhaugh.