There are 216 photos currently listed for SU0061 in geograph. 216 is also mentioned in this recent post concerning a Latona collage series interpretation. There it’s the number of cubes, hollowed and unhollowed in a 3d representation of a grand crop circle appearing just below Hackpen Hill last season, a grand finale as it were.
TEST: LLIS 05
TEST LLIS 06 (!)