The Aiur caverns are a giant underground system found beneath the surface of the Shakuras. It is an artificial city constructed said to be constructed by the Xel'Naga. There are at least two ways into the caverns, a large obvious passage and a secret "back" passage. The caverns are decorated in many ways, including ropy "swirls" which resemble vines. A "hearbeat" sound echoes in the caverns, getting louder as one approached the large crystal chamber. The system is very large, and one can be easily lost within it. It consists of tunnels connecting nearly-identical chambers.
