The whitewashed one actually reminds me of a brick wall outside the old swimming pool in Redhill in Surrey, where we used to stand with our 2p pieces, grinding holes into the wall - it must have had 200+ holes, all just as big as a 2p piece...

Now that starts me thinking - never having seen anything myself, are all the cups roughly the same size?

"built into the NE wall of Elrig House, 4.0m above ground level"

blimey! just making a note to add stilts to the RA kit...