Chestnut grove of Catasós Nature · Lalín, Deza, Pontevedra A wood of four and a half hectares declared a natural monument in the year 2000, with centuries-old chestnuts up to thirty metres tall and five metres in girth, held to be the tallest in Europe, mixed with oaks. Photo: Lameiro (CC BY-SA 4.0) What to see and do in Lalín