[For pix of terrains and boulodromes, see THIS.]
The most enjoyable way to play petanque is to play it on an open, natural, unmarked terrain.
Here are pétanque terrains and players in Collioure, France (courtesy of Homage to Barcelona blog). Real-world obstacles — trees, a light post, a sewer cover. Nice shady trees, a few benches for spectators, a gentleman walking his dog. This is real petanque.
An open terrain in L’Île-Rousse, a commune in the Haute-Corse département of Corsica, France.
A park in Orange, France.
The petanque club in Revel, France holds a tournament in the town park.
Click on the picture to view it full-size.