I put some soil in one of the corners and am going to be planting some tortoise friendly plants for them. I also have some rock I can put in.That looks great! Now add some 'furniture'. . . plants, either real or fake, boulders, knick knacks - anything to break up the line of sight. Think how boring it would be for you to wake up each morning, look out your door and be able to see your whole world. Much more interesting if he has to actually walk around in order to see what's behind that boulder or plant. I use a lot of aquarium plants with weighted base, and I bury the base down into the substrate.