There are a number of interesting caves with prehistoric significance. Some are natural caves (in Portuguese, grutas) that contain evidence that humans used them for shelter and/or for entombment. Others are man-made, carved into the stone intentionally to create a space (usually) for internment. (In Portuguese: gruta artificial or plural grutas artificiais) A man-made cave that was used as a temple or tomb is specifically called (from Greek) in English a hypogeum (plural hypogea). (In Portuguese, hipogeu or plural hipogeus)

Note that these sites lack evidence of human habitation. Any artefacts found will be displayed in museums.

Use the map at the right to search for specific sites or browse through the entries below. More posts are added as sites are visited!