The megalithic necropolis of Os Calvetes Curiosity · Santa Comba, Xallas, A Coruña Image of Santa Comba, not of the place itself. A group of five mámoas catalogued in the parish of San Pedro de Castriz. Together with those of Sanguiñeira and Alto da Mina they form one of the largest concentrations of prehistoric tumuli in the interior of the Costa da Morte. Photo: Elisardojm (CC BY-SA 4.0) What to see and do in Santa Comba