The caves wind all the way through a small mountain, which separates the ICM's territory from the Brighton Elite's. There is a cave opening at the back leading directly into Elite territory, but several years ago it was walled off when a big earthquake shook loose the stones lodged in the ceiling.
There are many tunnels and mini chambers in the Pennant caves, and it would be very easy to get lost in them. Only a few have been explored and are currently being lived in, leaving loads of rooms for curious young pups to wander into...and never come out of.