Vice City
Rockstar's modern-day Miami, and the centre of the map. Roughly twice the size of Los Santos on its own.
Vice City returns as a modern-day city rather than the 1980s version players remember. It is the densest part of Leonida and, by Rockstar's own comparison, around twice the size of Los Santos.
That figure matters more than the state-wide numbers. Los Santos is the busiest city Rockstar has built, and doubling it means a place you learn by district rather than by landmark.
The third version of this city
Vice City has been built twice before. The 2002 game was set in 1986 and ran on a soundtrack, a colour palette and a set of references drawn almost entirely from Miami Vice and Scarface. Vice City Stories went back to 1984. Both were period pieces about a moment that was already twenty years gone when they shipped.
Moving to the present day is a bigger change than it sounds, because the pastel and neon that defined the old Vice City were a costume. Modern Miami is a different city with different money in it: international property investment, cruise terminals, finance towers along the water, and a tourism industry that has industrialised. The trailers keep the neon, but they keep it as something the city sells rather than something the city is.
What has been shown
Beachfront strips with art-deco frontage and neon, a downtown of high-rises, the Pagasi residences on the water, and the Megamundo building used in the Extended Look's closing robbery.
Confirmed landmarks across the wider map include a large airport, a football stadium, an amphitheatre, a military base and a fully explorable zoo.
The real-world layout it is drawing from
Miami is unusually easy to translate into a game map because it is already zoned into legible pieces. There is a barrier island with the beach, the art deco district and the nightlife on it. There is a downtown core of towers across the water. There is a working port. There are wealthy waterfront residential fingers, and there are neighbourhoods immediately inland with none of that money in them.
Everything shown so far maps onto that structure, which is a good sign for a city you are meant to learn by district. It also gives Rockstar the thing it has always done best: two places a short drive apart with completely different economies.
What is not known
District names have mostly not been confirmed. How much of the high-rise interior space is enterable is unknown, and Rockstar has not said whether property ownership returns in the form it took in Grand Theft Auto V.
Related: the Leonida map.