Creepy and Mysterious Ancient Cave Paintings Found in the World!

The rock and cave paintings of our ancestors open a vivid window to days long gone. And basically, the people of that time probably immortalized on the stone walls what caught their eye every day – such as animals, people or hunting scenes. But even if we assume that the ancient artworks do indeed depict the reality of life in the distant past, what on earth are the grotesque creatures that resemble monsters or futuristic aliens? Could it be that these eerie figures once actually walked the earth – or are we just dealing with purely symbolic motifs here?