Giant African Land Snail on wet tarmac road (South Africa) by Steve Lamb Via Flickr: The Giant African Land Snail (Achatina fulica) - this is a young one as it wasn’t nearly as big as they can be (up to eight inches long). We found this one crossing the road, in a rain storm, and he was probably three or four inches long. Interesting colors and markings. Even when you are looking for elephants and other big mammals you have to be aware of what’s about. Addo Elephant National Park (Eastern Cape Province) South Africa.