Hi Joanna. Yes it is a gabion wall you are looking at in the Facebook photo. I have them across the back of my house to retain the slope, which was dug out to provide a building platform. The gabion "baskets" came ready assembled, from memory, with reinforced corners and "lids" which were bent over and secured with wire once the baskets were full. Each basket was 2 meters long and one meter high. Two local stonemasons (they also build dry-stone walls) filled the baskets carefully with stones from the quarry up the road, selecting each stone so it fitted snugly.
The first photo shows the back patio before the gabions were installed. The second one is taken more or less from the same spot this afternoon. The area behind the wall was planted up just over 12 months ago, so progress has been good.
Hope this helps!