(CJ: Not comfortable seating tho.) Here's a video tutorial that shows you how to make your own inexpensive DIY outdoor bench using a few concrete blocks and some wood beams.
21 beautiful DIY benches for every room. Great tutorials on how to build benches easily out of wood, concrete blocks, or even old headboards and dressers.
companies that sell decorative concrete screen blocks - comprehensive list - Retro Renovation
Mix of materials, interest added with the plants, feels warm and inviting.
At Home with Caroline Lee in Los Angeles, California