Hey!
Finally made it to the Cairn de Barnenez the other day, which is fantastic. The fifties quarrying has exposed the back of the dolmens of the secondary cairn. Indeed, it is one of the few places with corbelled chambers intact, makes sense out of those really low orthostats in the chambers of many denuded breton dolmens. Check it out, even if it does cost 4euros 60....
I also visited a number of, thus far nameless, allee couvertes earlier in the week. One was very interesting in that it had its orthostats leaning against each other, as in around eight other examples around here, but then there were huge capstones balanced atop the lot and leaning also on the cairn! Could the others hereabouts have once had this feature too?
Gonna try and see some more stuff soon, hope yer all cool, Mark