As expected, Old Dunling is not just about what's on the surface; it is a city with "depth," just like this subterranean city.
"One of the Rat Nests, everyone needs a place to huddle together for warmth, and this is a pretty nice one," Kamu replied.
Lorenzo looked up. A faint light descended from above, and with it fell millions of tons of water, cascading down from a height, creating a light mist.
It was a massive waterfall, diverted by channels from the Thames River, flowing continuously into the boilers deep underground.
The entire space descends vertically downward. This is one of the multiple filters for water purification; the waterfall crashes into the reservoir below, continuing downward through various web-like channels.
