Actually, if memory serves there is one place near the end of the game. Spoiler follows, please highlight:
You'll eventually reach a planet with two opposing settlements. One of them is shielded off by lightning arcs and if I remember correctly, a hologram of some kind. The way to that particular settlement is guarded by a couple of smaller rancors. You can find them over and over again, but you may have to reload the area to do so.
I haven't played the game in years, I could be wrong about this. Or perhaps it was fixed in a patch. Also, I just realized the endgame itself spawns a lot of enemies. It's kind of pointless to go with the spoiler above.
