Buno-Bonnevaux, Essonne, France. Polissoir des Sept coups d'épée, next to the church.
<a href="//commons.wikimedia.org/wiki/User:Poulpy" title="User:Poulpy">Poulpy</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>