(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.
Top 10 Unexpected DIY Concrete Block Furniture Projects with Picture Instructions for Unique Budget Home Decorating and Improvement.
At Home with Caroline Lee in Los Angeles, California
Cinder Block Mosaic Planter - eclectic - outdoor planters - san francisco - by Mid Century Mosaics