Both poems are stunning, embracing and communicating so well the experience of witnessing the past. I left the confines of my room and was easily transported to witnessing it too. Brilliant journey - thanks for this LS!
I think this one counts as megalithic (it actually includes the word itself), Heaney's 'Funeral rites' makes mention of The Boyne tombs and even cup-marked rocks (H'rah!)