A cairn, at its simplest, is a mound of stones raised deliberately by human hands, most often during the Bronze Age or earlier, and most often to mark a burial, a boundary, or a place of significance that the people who built it understood in ways we can no longer recover. What makes Sheeaun's cairn quietly compelling is not any dramatic feature but the particular stubbornness of its survival, the way these structures persist in a landscape that has otherwise been grazed, drained, and reshaped over millennia.