I read, and I am racking my brains to remember 'in which book?!' years ago that the Puritans burnt down a wood henge below The Caburn in The Commonwealth period. It cannot have been too low down as there were 50,000 m2 of salt-marsh, (before being drained in 1570 by Dutch engineers) according to their tests down there.

It is doubtful if The Caburn itself had a wood 'henge' as their are no known examples anywhere on top of hills. Also of note is that they found that in the Bronze Age there were yew woods leading to The Caburn with paths from barrow to barrow. Sometime from the end of the Bronze and the Iron Age these were hewn. The whole hill was lit by the sun, or visible, torch-lit from below.