Prehistoric engravings of giant snakes along South America’s Orinoco river are among the largest examples of rock art we know of anywhere in the world, with some stretching for more than 40 metres.

Deep in the Colombian Amazon region of Serrania De La Lindosa, a roughly 12-mile stretch of rock is covered in a vast ...

Gemma Keech, who lives on the Love's Farm development in St Neots, Cambridgeshire, started the rock art with a snake face painted on one stone. Her children added a couple more for its body and ...