Swamp- Mor dhona

Mor Dhona is a region in Final Fantasy XIV
in the world of Hydaelyn, on the realm of
Eorzea, and on the sub-continent of Aldenard,
to the southeast of Coerthas and north of
Thanalan.
It's lake is the site where Midgardsomrmr, and his army of dragons fought the Garlean fleet 15 years ago.