This old shed is made with a mix of stones and concrete blocks and has been patched and shored up over the years.
Most of the cabanons du vigneron that I see around here are more or less abandoned and not used for much anymore. This one is closed and locked up; others are left open to the elements and wildlife. Those are grape vines planted around the shed. They produce grapes (but they're not harvested for wine), and the growers prune the vines back every year.