Nick made a mental note of the location of the building and what it was for.
Naturally, as a hospital, it was quite big, but it wasn't big enough to fill out more than a square kilometer of area.
It was maybe just a hundred or two hundred meters across, which was already pretty big.
After finding out what this place was for, Nick went to the basement of the building.
'Most likely, the underground city was kept secret from the normal populace. Otherwise, there would be more entrances to the underground.'
'Probably only one or two buildings in the center have an entrance that would lead to the underground city.'
'The chances that it is the hospital are quite high. A good volume of people enter and exit from here, making it easy to keep the passage of people to and from the underground secret.'
Nick looked through the basement of the building and saw more rooms with more machines.
