When entering this area, you will be greeted by intense fog and many swamps. Going through to the east you will find a bench and a creature laying in the water. Going a bit south then following the pier to the east and north again will lead you to another bench and a house that leads to Deserted Town.
There's a man sitting on the edge of a pier that if interacted with will teleport you to the Windmill area (you can go back through the same NPC). You can find a vending machine and a bench somewhere in this area, a "moon" floating in the middle of a big swamp and a couple of floating creatures that if the Marginal effect is equipped they stop moving. Somewhere in the area, there's a "broken" little building blocked by a billboard.
There is a separate section of the map where you enter back from the deserted town bridge area. This area is just a simple pathway going bottom to top with several pillars on either side dotting the way up. When you go up the pathway you eventually reach a small building with a doorway . When you enter the small building, you will end up in the upper portion of the deserted town.