The Drainage System is a massive sector of pipes on a distant planet with Earth-like gravity. These pipes stretch through the planet's core, and heat up to ludicrous temperatures - however, via some antigravity system and extreme heat resistance, they can resist the rock-melting heat and pressure of the core. The surface of the planet, however, is completely covered in water, and only rarely do any pipes stretch up to it. The atmosphere of these pipes is humid and hot.