This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
H Campo Galicia the Switzerland of Spain . gl Debuxo de Henrique Campo reproducido no libro Galicia the Switzerland of Spain de Annette Meakin co ttulo Prehistoric writing discovered on boulders near the town of Pontevedra in Galicia the Switzerland of Spain de Annette Meakin Henrique Campo Sobrino PDold Petroglyphs in Pontevedra