I discovered this stump and plank garden bench idea on Pinterest from HomeEsthetics.net and it linked over to the complete article, 27 Extremely Useful and Creative DIY Furniture Projects That Will Discreetly Transform Your Decor. There are a bunch of good ideas in that article, but this one caught my eye. I wonder if sitting on the ends might be a bit precarious and cause the seating to twist, but sitting in the middle should work fine. I might try something on a smaller scale here in the garden to see how well it works.
Previously in Garden Decor: