Undercity

The Undercity is a large incomplete industrial city deep under the main capital city of Zerkonia in Passivaria.
The Undercity began its construction on the 16/08/1832 (Pre-War) Under orders by the Passivarian Republic Government to act as a safe haven for the citizens of Old Zerkonia in event of an apocalypse scenario.
The Undercity was designed to act as a city within a city, built deep in the caverns that span 30 miles wide being held up by natural massive stone pillars.
The Undercity was heavily industrialized, often causing pollution issues due to the fact the city is in a cavern, to combat this they began to build chimneys which would go through the ground and out to the surface. From the outside it would look like flat open plains with chimneys randomly sticking out.
The project to create the city was eventually scrapped on the 12/08/1855 due to the Black Powder Wars requiring more resources and the fact the construction project lead to many deaths, at least 3000 deaths.
The Undercity currently is an incomplete abandoned steampunk city where daring adventurers like to travel.
The city can be accessed by going through the sewer network which spans Zerkonia. One major accessible route would be through a designated entrance deep in the Fironikan Palace.
The Undercity is a dangerous place to traverse due to the unstable construction sites and sudden drops.
There is a planned project to complete the construction of the Undercity and to add contemporary support beams to keep the cavern stable and secure to prevent weathering.
There is a really long natural cave that goes from the cavern all the way to the sea right next to the Massatong Shipyard.
The Undercity is believed to be haunted by the Old Zerkonian Ghosts.