Constructed in the lowest point of the swamps, the city of nagas, also known as 'Serpentine' was home to thousands of nagas lead by the naga queen, Alleiah.
This city wasn't built under the swamps by accident but had been slowly planned out over the four years that the lizardmen have existed. Even though the buildings inside were mostly built by wood, mud and stone-like houses of the old, they were quite stable. The nagas had learned to utilise the properties of basic materials to their maximum potential. Something which Arnold also used to aim for while making gears or any other thing for that matter.