This is a beautiful idea for our front yard, minus the lawn, because we need to cut down on water use.
23 Simply Impressive Sunken Sitting Areas For a Mesmerizing Backyard Landscape homesthetics decor
A sunken design and rustic flagstone walls ensure that gravel doesnt spill into the adjoining gardens and lawn. The smallish gravel mimics the various colors seen in the stacked stones and the fireplace to generate a pleasingly cohesive composition.
Railway sleepers -Vertical sleeper walls use to screen off end of garden? (even as sculpture, varying heights with gaps)