The forest from Last Killers is the scene of the Chasmosaurus chase.
The forest is first seen when a Daspletosaurus stalks a Chasmosaurus. However, the Chasmosaurus notices the tyrannosaur and it chases the predator away. Later in the episode, the same Chasmosaurus is chased and killed by a pack of Daspletosaurs. While feeding on the carcass, a young Daspletosaur is warned off by a larger individual. The narrator(John Hurt) explains that in Planet Dinosaur, the strongest takes all. The forest is never featured again in Planet Dinosaur.
1. The forest is in North America.