"We Octarians dwell in a world deep underground. The individual caves in which we live are connected by a network of transport devices known as kettles. Wow... You learn something new every day!"
— Sunken Scroll 2, Splatoon
The end result of Nosferatu labor is a trackless, lightless, multileveled, subterranean maze, branches of which honeycomb the entire city. The Nosferatu ensure that nearly every important building, industrial park, etc can be reached via their "warren." Particularly in older cities, these warrens are gigantic structures.
Centuries-old corridors connect with abandoned subway tunnels and disused bomb shelters. Entire sublevels of buildings lie empty and gaping. Secret shafts lead from the cellars of the elite to the Nosferatu's chambers. Crypts the size of rooms or even houses lie directly beneath the glittering skyscrapers of the wealthy. Flooded sewer pipes provide watery transport for the vampires, who build crude skiffs from plastic and lumber.
Certain adventurous vampires of other clans have descended into the Nosferatu warrens, but few - suspiciously few - have ever re-emerged...
—Vampire: The Masquerade - Clanbook: Nosferatu
Beneath its surface, the Warhammer World is riddled with a network of labyrinthine tunnels linking scattered underground strongholds - the Under-Empire of the Skaven. The capital of this subterranean sprawl is Skavenblight, located in the Blighted Marshes of northern Tilea. This terrible multi-leveled city is the site of the Temple of the Horned Rat, a towering tribute to the Skaven's unholy deity. The upper levels of the city are divided into districts controlled by the most powerful of the Skaven clans. Under the surface, Skavenblight is a nightmare of tunnels: some serve as squalid residential areas of lower-caste Skaven, some as sewer pipes, and many as both at once. These tunnels spread out in all directions from the city, into the ever-expanding Under-Empire. Subterranean tunneling has taken the Skaven as far as Imperial Cathay in the east and to the tropical lands in the south of the Old World; they have even taken over a large portion of the World's Edge Mountains - at the expense of the native Dwarfs.
—The World Of Warhammer
There isn't a dwarf alive who remembers the Deep Roads as they once were. They were the network of tunnels that joined the thaigs together. To be honest, it isn't even right to give them such a simple term as "tunnels": they are works of art, with centuries of planning demonstrated in the geometry of their walls, with the statues of the Paragons that watch over travelers, with the flow of lava that keeps the Deep Roads lit and warm. The cloudgazers up on the surface talk of the Imperial Highway built by the magisters of old, a raised walkway that crossed thousands of miles, something that could only have been built by magic. Perhaps it is comparable to the Deep Roads, although we dwarves didn't need magic.
—Transcript of a conversation with a member of the Dwarven Mining Caste, 8:90 Blessed, Dragon Age: Origins
Cheryl: ...And then this one here goes all the way up to Lenox Hill Hospital.
Lana: Jesus, that's like a mile!
Cheryl: Yeah, you don't want to walk that, so I'd come up around here and call a cab. That'll be way quicker. Plus, I bet there's Mole People.
Cyril: I think her point was, with all this, your great-whatever uncle must have really wanted to catch some slaves.
Cheryl: Oh, it bankrupted him. And the crazy part was that this was, like, 1890.
The tunnels beneath Kingsmouth offer a small-scale glimpse of the kinds of labyrinths The Illuminati have chiseled throughout the world. The New World, especially. The one in New York is considered to be their crowning achievement.
The logic and purpose of all of them remains essentially the same: to twist and conceal the truth.
—Bong Cha, The Secret World
