This is Longsunder. Longsunder is a Dwarven redoubt at the heart of a small delta and swampland. It was fashioned as a forward operating base on the front of a war won long ago. It has since fallen into disrepair and was abandoned as the enemies that it hoped to deter are no longer a threat. Since it's vacancy, Longsunder has become a haven for a displaced people from a more recent conflict. They have built up around the fort in a much more sustainable way given the changing landscape of the flooded lands; however they maintain the fort as communal housing and gathering spaces for their religious ceremonies.