New Argolis was a city constructed by the Crone Hegemony to provide their soldiers with recreation during conflicts in the Ilmari region. Although the city was ultimately swallowed by the desert, entrance-ways into parts of the city may be found and explored as War Caches.
“We've found another war cache in the region that used to be 'New Argolis'. It wasn't on the front lines. Hegemony troops went there for booze and whores. So there shouldn't be any spike traps or death beams or anything.