Tumulus necropolis of Cristo dos Callós Curiosity · Ourol, Mariña Occidental, Lugo Image of Ourol, not of the place itself. A group of seven megalithic tumuli on the hill of Cristo dos Callós; to them are added in the same concello the two mámoas of Pena do Toxo and the tumuli of A Veiga and of Penido Vello, the latter with its dolmen in view. Photo: Elisardojm (CC BY-SA 4.0) What to see and do in Ourol