With twelve million inhabitants under its four domes, Nyhavn is the gem of the [[Titanian Commonwealth|Commonwealth]] and the largest transhuman habitation rimward of [[Mars]]. Rising from the hills of the Xanadu region, Nyhavn was sited for proximity to the equator and to the plateau of nearby Mt. Kristiansund, an ideal site for eventual construction of a space elevator. Viewed from a distance through the planetary carbon haze, Nyhavn’s domes, with their constant air trafﬁc, remind those who can remember of jars of ﬁreﬂies, set out by a child to ward off the dark.
=Neighborhoods= 
Nyhavn’s neighborhoods consist of four domes, a variety of other surface works, and a vast network of underground tunnels. Several major rail corridors and highways/ﬂyways, busy at all hours, connect the domes.
==Great Nyhavn== 
Nyhavn’s massive central dome, several kilometers across, is nearly as large as that of [[Valles-New Shanghai|New Shanghai]] on Mars, and pierced in a dozen or so places by elegant blue spires that reach skyward from the ground below. Great Nyhavn is a business and residential district where aerial trafﬁc runs between towering buildings, but it’s also the Commonwealth’s public showpiece, with sports stadiums, parks, restored colonization equipment from the First Settlement, and museums taking pride of place.
Great Nyhavn is heavily planted with trees, mainly conifers, and cut through by numerous canals and small lakes. Banks of lights power plant photosynthesis, and in turn the great conifers yield a considerable percentage of the dome’s breathable atmosphere. Other life support methods like algae vats and CO2 scrubbers supplement the trees.
This sort of heavily planted biosphere is repeated throughout the city, as well as in most of Titan’s other settlements. Although algae vats are more efficient oxygen producers, the psychological beneﬁts of bright lighting and vegetation justify the energy expenditure. The main argument at present is between those who favor powering the system by burning hydrocarbons and the preservationists, who advocate switching over to fusion and other energy sources as quickly as possible.
Titan’s media have made Great Nyhavn their home ground. Although the business of government is conducted primarily in Old Nyhavn and on the mesh, important media channels like PAC-1 and PAC-2 have ofﬁces here, as do the local bureaus of many offworld media outlets.
The constant presence of news, entertainment, and sports ﬁgures has led to some of the most conspicuous application of Janteloven in the Commonwealth. Not only do Nyhavners deem it extremely déclassé to acknowledge the presence of a celebrity, the celebrities themselves actively avoid being treated in public as ﬁgures of note. One mesh personality, whose popularity had waned, quipped that she didn’t mind so much; she enjoyed being able to joke with her barista without everyone around assuming she was being condescending. On Titan, to be a celebrity is acceptable only in simulspace; on the ground, one must be a citizen.
==Telemark City== 
The newest of Nyhavn’s four big domes, Telemark City rises to the east of Great Nyhavn. The Plurality built Telemark City to help accommodate the massive number of Commonwealth citizens being resleeved under the One Body per Mind law. The law mandates minimum standards of housing for the reinstanced—no warehousing them in underground warrens, for example. One sees little of the squalid blandness that prevails in working-class Martian housing. The neighborhoods of Telemark City are a riot of color and embellishment, encouraged in part by public fabricators and by recent public enthusiasm for pre-industrial handicrafts.
Telemark city is nearly full. Another habitation dome north of Great Nyhavn is already being planned as the public resleeving system catches up with the backlog of people still in dead storage from the Fall. All is not well, though. Here and in many sections of New København, the reboot gangs represent a social time bomb for Titan. Martian economists scoff at the One Body per Mind law, and from the standpoint of a political and economic system that places capital over compassion, they are absolutely correct. A massive number of the reinstanced don’t have the skills to make reputations for themselves, so they turn to the only social network that has a use for them—Guanxi. Open violence in Nyhavn is uncommon, but the police stay very busy.
==Old Nyhavn== 
The ﬁrst and smallest dome, Old Nyhavn houses government ministry ofﬁces and very little else. This is the least active and bustling of the domes, yet all Titanians are familiar with it, because almost everyone spends part of their civil service term here. Old Nyhavn is largely mothballed for day-to-day use, but in the event of another TITAN attack or large-scale civil emergency, it’s designed to act as a command and control center for the planet.
The buildings inside are bunker-like, with independent life support in case the dome is breached and heavy nanowarfare countermeasures. Copper wiring and primitive computers, too simple to fall prey to TITAN mesh attacks, connect Old Nyhavn to similar communication centers in every major habitat on the planet. Voice communication is provided by a hardened, pre-information age telephone system run off an analog (yes, analog!) switchboard system. The guts of this system, along with backup controls, are half a kilometer under the ice. Every Titanian citizen trains on this equipment during their civil service term. 
It may seem incredibly paranoid to maintain a system like this, one based on technology even the Jovians would view as neolithic. But while slow and primitive, the system was battle tested aboard Fleet’s ships on a smaller scale during the Fall, and it works. Titan is a cyberdemocracy, and the Old Nyhavn backup system means that even in a full-on infopocalypse, our government can maintain a minimal level of functioning.
Kilometers below Old Nyhavn is Lake Nyhavn, a tidally warmed lake of water and ammonia that the original settlers tapped to bootstrap biosphere development.
Embassy Row in Old Nyhavn holds most of the embassies of offworld powers, although a few (notably the Planetary Consortium trade legation and the embassy of Elysium) are instead located in Great Nyhavn, closer to the media and microcorp ofﬁces. For most inner-system powers (and the Jovians), Nyhavn is the only place in the outer system where they have embassies. This makes Nyhavn the obvious meeting ground for anyone who has business with sunward polities that can’t be accomplished remotely.
==New København== 
Built after Great Nyhavn but before Telemark City, New København stands directly south of Great Nyhavn, astride the route of the North Xanadu-[[Aarhus]] rail lines. New København is densely built. Apartments ﬁll the upper stories, while microcorp facilities—labs, microfacturies, and ofﬁces—pack the lower ones. New København also has a large population of the working reinstanced due to its proximity to the Skyport and the rail yards, and many of the microcorp facilities contain specialized teleoperations centers for workers running synthmorphs outside.
==Skyport Nyhavn== 
The Skyport is Titan’s busiest short haul spaceport, with ﬂights to orbit and to almost every settlement on the planet with an airstrip. Atmospheric craft ﬂy under power, but many orbital ships use their rockets only for re-entry. Titanian gravity makes it more efﬁcient to use catapults or mass drivers to ﬂing a ship into orbit.
Military and police ships also berth at Skyport, although they’re rarely visible from the tarmac except when landing. Most launch directly from fortiﬁed hangars dug into the ice.
Skyport looks like an incomplete dome from a distance, surrounded by a thick, cylindrical barrier wall of ice similar to those ringing the domes. The barrier wall serves as a windbreak, a way of slowing the drift of ice and carbon silt onto the tarmac, and additional fortiﬁcation for the military assets berthed there.
==Tyska Lacus== 
Tyska Lacus is a good-sized methane lake, 120 kilometers across at its widest point, but also shallow, with a depth of at most 3 meters in most spots. The lacus is used for recreation, with methane skiff sailing a popular sport, but hydrocarbon extraction is what brings the most transhuman activity. A large reﬁnery draws methane and ethane from the lake, whence it ﬂows along a pipeline to Nyhavn. Hydrocarbons from Tyska Lacus supply about 30% of Nyhavn’s power, but at a price. The early belief that rainfall would keep up with transhuman demand hasn’t panned out, and the lacus is now half a meter shallower than when we arrived here.
==Space Elevator Construction Site== 
Depending upon whom one talks to, the space elevator is either a victory for the preservationist movement over those who wanted to simply keep burning hydrocarbons to send rockets up, a waste of social money, or a benchmark of Titan’s continued maturation as a great power in the solar system. In any case, construction should be completed in about a year. The site already boasts rail and road connections, an ice shield wall like that encircling Skyport, and groundside fabrication facilities for the cable. Meanwhile, in orbit, work proceeds at a brisk pace to stabilize and prep the counterweight, a sizable ice asteroid. Security around the site is some of the tightest on the planet. Everyone remembers the failure of the Scoop project, a megastructure designed to skim gas directly from the atmosphere of Saturn without mining drones. XPs of the Scoop’s main intake shearing off from its counterweight and tumbling silently downward to be engulfed in the yellow fog below still see playback during Plurality debates and on news programs whenever someone wishes to make a point about the hubris of one of our mega-projects.
Though never proven, sabotage has long been suspected as the reason for the Scoop’s failure, and a repeat of that disaster would be a terrible blow to morale in the Plurality.
==The Warrens== 
If you want to live off the grid but in the conurbation, you go down. Don’t even have to dig; that’s been done for you. Nyhavn’s got dozens of kilometers of subsurface tunnels. Some were made by early carbon prospectors, some to pump liquid water up from Lake Nyhavn, and some still get used for pipelines, feedstock lines, and automated cargo transport. There’s geothermal bore holes, too; they experimented with using the temperature difference between the surface and Lake Nyhavn as a power source long ago.
Aarhus and New Quebec got big tunnel networks, too. Most of these passages are unused, with little or no surveillance. They got no breathable atmosphere, and they’re cold, though not as cold as the surface. Still, people live down here—people who don’t want to be bothered. And there’s always rumors that the gangs, tongs, and Section Three types keep some of their secrets hid under the ice.
—Balthazar Grimes, A-Bloc dissident

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