Dolmens are interesting - what's that about?

Dolmens are big pieces of stone, big stone tinkertoys, art pieces, stone moai and such—like at Stonehenge. It seems as though, as a species, we’re quite interested in these things. Would it be crazy to suppose that these things might be signifiers of a preferred (ice age?) environment that’s built into the human psyche—kind of like how a spider might choose a specific place to build it’s web or how a turtle might find itself migrating to a distant island to breed. . . and we just “make ourselves at home.”