Underneath;

The Windclan cats have a trick up their sleeves, an ace in the hole so to speak, in case they need a quick escape. You see underneath that flat park where they run is a series of underground tunnels. How it got there is a mystery, but they are there and the Windclan cats have mastered its twists and turns like no other. But it is always advised to travel in groups when leaving the surface, in case of caves ins, or worse.