Petroglyphs are man-made drawings and symbols drawn on stones from the prehistoric era, mainly from the Bronze Age. 

In the Bronze Age, it was very common to draw petroglyphs. Therefore, multiple petroglyphs drawings have been found around the world. The drawings often depict naturalistic images, where symbols of animals and humans performing ritualistic acts are rather frequent.

In Denmark, the Petroglyphs can be seen at Madsbakke in Bornholm. Petroglyphs can also be seen in Sweden and Norway.