A simple farmer's earth dam
<a href="//commons.wikimedia.org/wiki/User:Fir0002" title="User:Fir0002">user:Fir0002</a>
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/User:Fir0002" title="User:Fir0002">user:Fir0002</a>