The Big Solinopolis is three-layer megastructure. There are 3000 people living here, scavenging the remnants of the old society who used to live here. It is very hard to find a person here, because the district is so big.
You are advised to not quit the New Solinopolis district, as it is extremely dangerous to travel in the abandoned Big Solinopolis. Possible causes of death include:
Pipes and other objects falling on you.
Asphixia (some rooms remove all air sometimes).
Murder by other travellers.
Hunger.
Dehydration.
You might also lose sanity in this maze of pipes. Try not to get lost in the pipes.