I know that Stonehenge is somewhere in the FS4 versions of either SD-Eur or SD-GB1
scenery disks but I can't find it this time. I found a possible candidate in the FS4 SD-GB1 (Great Britain Scenery Collection) at these coordinates: N16059.4616 E16071.8389 . It's bigger than a Cessna and it's not round but for all I know it could be Stonehenge or someone's barn silo!
I am finding the chalk drawings on FS4's SD-Eur scenery disk just fine.
If anyone has copies of the maps for SD-Eur or SD-GB1 scenery, coordinates for
Stonehenge in either scenery or a mode (.mod) file let me know!