Actually, that first/only image reminds me - I've wondered several times about whether there's a relationship between WKLB and The Sanctuary: although the main spine of the barrow doesn't align with the Sanctuary, the later front portion kinks and looks very much as if it's made to look straight at it.
Standing inside the sanctuary, looking in the opposite direction, the posts seem to be arranged to provide a clear view of the barrow, even from the back.
Anyone noticed this?