The sea does not care that it is underground. It was a sea before there was a sky, and it will be a sea long after the concept of "above" has been forgotten.
FROM: A Natural History of the Subterranean Waters BY: Archivist Quill, Keeper of the Drowned Archive EDITION: Fourteenth (Revised, Expanded, and Partially Rearranged Overnight) Let us begin, as all proper natural histories must, with a correction. The Unterzee is not underground. The Unterzee is beneath — a distinction that may seem academic until you have spent, as I have, longer than institutional memory extends cataloguing the difference between "below the earth" and "below everything else." The earth, you see, is a specific thing: soil, stone, the compressed memory of dead organisms. The Unterzee is beneath something far more fundamental. It is beneath assumption. It is the place you arrive at when you have descended past all the layers of the world that pretend to be solid and discovered, at the bottom of that pretence, a body of water so vast, so ancient, and so utterly disinterested in the affairs of the surface that it makes the oceans above look like enthusiastic puddles. T...
From the lore of The Gaslit Reach.