H.A.F.
a.k.a. Rusty Nails
Looking at that pic again, and how the loops provide walking access it's pretty ingenious. The "bad" part is that it's pretty obvious he had dirt trucked in. For grass lawns that's fine but for gardening it's less than optimum. My best option would be to lay out the logs and branches then dig down in the walking areas between them and toss that on top. I have an area house-ward of my new garden area that's plowed flat for garden, but we found the construction trash from them flipping my house. Nothing nasty, but lots of brick and rock wall remnants that were shoved in a hole and covered over. Fuckers...or some funky Hugelkultur beds
The curves may be a bit much, but just a zig-zag or something with longer logs as the 'design' might work well for there. I need the hugel or something and that's better than hauling in dirt, and I can skim the good topsoil off the bricks and rocks area to cover it or get it started well.
I have several long limbs that I will now keep as long as possible until I figure out what I'm doing, but now I know where it all has to go! I can lay it out there to age and worry about it next year but at least it's a start.