There was a CGI show called The Future is Wild, a speculative evolution documentary which was about life on Earth millions of years after humans disappeared. One creature it featured was the Toraton, a descendant of giant tortoises that was the biggest creature to ever walk the land, even larger than those prehistoric sauropods. That's a picture of it, unfortunately that was the best one I could find. You should watch that so if you haven't seen it, it was really good.
My gosh, I can't believe it's already almost 25 years old. They came up with this after Walking with Dinosaurs and Walking with Prehistoric Beasts, which are also very much worth watching. There was also speculative ones about life on alien planets.