I've had a look. Traffic was shocking. Fortunately, I was able to wave my TME VIP card at the friendly Wiltshire Constabulary's representatives, who recognised me as a fit member of a regularly organised society, and they let me through immediately.
Anyway, from Milk Hill you can see Giant's Grave, in a fairly good alignment on the reciprocal bearing to Tan Hill.
Milk Hill also sits on the line from Silbury to Casterley Camp.
Some of the long-term TME inmates might remember my attempt to interest the TME society in these "triplets" that seem to occur quite regularly.