Hillfort of Callobre Nature · A Estrada, Tabeirós - Terra de Montes, Pontevedra Image of A Estrada, not of the place itself. A pre-Roman fortified settlement set on a height that makes use of the valley's natural defences, in the parish of Callobre; nearby the river also forms a small waterfall amid riverside woodland. Photo: L.Miguel Bugallo Sánchez (http://commons.wikimedia.org/wiki/User:Lmbuga) (CC BY-SA 3.0) What to see and do in A Estrada