is that a has been tennis court?

I looked this up. It is indeed an usused tennis court which has been repurposed.

nice!! there will not be any weeds growing between the beds :)

In content that got left behind, we just had a big KGI discussion question about installing raised beds on a concrete patio in Seattle. I liked Brother Joseph's suggestion that the bottom drainage layer should be old straw flakes. That sounds more organic & more absorbent than gravel. These beds look like they are getting active use & they are not sifting out under the edges. I wish we knew what they used. :-)