I'm not sure if container gardening is the right Forum for these... they are very large containers I guess (4' X 8'). I've posted several times about how I make my raised beds from stacked 4X4 fence post, but I never got around to doing pictures. Here's a photo of two of them sitting on the concrete patio, all mulched and put away for the winter. I have one more of this style, plus other beds that are just landscape timbers or whatever.
Incidentally when we bought the house, the patio was just a plain grey concrete slab. I hired a guy to come in with a big concrete saw and cut the grooves and then stained the concrete. Now it is quite an excellent imitation of terra cotta pavers and very much prettier.
PS Built these 8 years ago and they are still very solid.