Riverene was built to be easily traversed. Its buildings were organized in a grid pattern and businesses of different kinds were put next to each other.
The building Gio was looking for was in the financial district. Though the majority of the city was empty and rotting, the symbol on the building was still present.
It took some imagination to match it to the description Leonidas provided, but there weren't many buildings with green logos on them in the first place. Locating it wasn't an issue.
'Their lab was underground, coincidentally enough.'
They ended up living underground without a choice, but their work started below ground because they had something to hide.
Gio led his party into a nearby bank building.
[If we didn't have funding from the government, we would've never been able to do what we were doing. The government didn't want Vita to be humanity's savior. They got tired of not gaining anything through the improvement of humanity.]