The fountain in the center has water that wells up from underground and water flows out of the broken rim towards the back, turning the earth here into saturated mud. Upon closer inspection there are definitely runes around the edge of the fountain.
In the back the legs belong to a dead goblin, his red and black armor torn open. Rats have been at him as well as one of his companions who lies back there as well. Another three-foot mole creature lies here, its head bashed in, apparently by the goblin's spiked clubs.
The goblins each have a belt pouch with a ceramic stoppered flask in them, a silvery crescent painted moon can be made out on one of the two flasks.
The shelves contain various fungal growths and mushrooms as well as collected herbs and roots, some of the niches are empty, their contents scattered on the muddy floor.
A hole low in the wall is big enough to allow the mole creature and possibly the thin long thing you killed to maneuver through but it would be a tight squeeze for a man or dover to crawl slowly along it. A second hole on the opposite wall can also be seen here.