Tunnels

The tunnels are hollowed areas that are on both sides of the ThunderClan-WindClan border in the lake territory. They are described to be musty, damp, and rocky, and have small holes that let in some moonlight. There is also a river inside. Rain can build up and overflow it, causing floods.

The Ancients made their transition from softpaw (apprentice) to sharpclaw (warrior) by making it through these tunnels. Some cats made it, while some didn't (for example, Fallen Leaves was trapped by a flood).

Heathertail and Lionblaze used these tunnels as a camp for their pretend Clan, DarkClan. Later, after Sedgekit, Thistlekit, and Swallowkit are rescued by Heathertail, Hollyleaf, Jayfeather, Lionblaze, and Breezepelt from a flood in the tunnels, a mudslide blocks the entrance, making them impossible to enter.