Lake Dlochna is a subterranean lake found in Minaltum in the Holy Empire of Acolytius. There are many underground streams that flow in and out of the lake, with its waters going deeper into the earth to an undiscovered destination.
The city of Sloseud, which is the oldest inhabited city in Minaltum, was developed thanks to Lake Dlochna. Alongside being a source of fresh water, a natural skylight in the cavern where Dlochna sits allows some plants to grow. The multiple provided benefits, alongside the idyllic tree growing on its central island, has essentially made the lake sacred to the locals.