El Cajon Mountain

This piece of nature probably has the most rocks and boulders you'll ever see in your life.
There is a respectably-sized clowder living amongst the rocks at this peak, with a decent system of order: a King, Queen, Prince/Princess and Citizens. There are flaws in this system (they have no organized fighting force nor any sort of healer teachings... or effective teaching system at all; it's all very traditionalist), but they manage along fairly well, anyway.
If you must intrude on their turf, hide beneath the thick foliage along the ground, because the members of the clowder use the rocks to scout for intruders... and they're plenty vicious, quickly gaining the knowledge of how to maneuver along the rocks with speed and deadliness.
Rattlesnakes are a threat.