Calling Moondown the largest continent does not accurately depict its size, nor the way it dwarfs every other landmass by dozens of times. So enormous is it, that the majority is uncharted and the exact size uncertain - with only guesstimates based off poorly-funded seafaring expeditions.
For the central swath of Moondown, seemingly endless, is an ever-expanding, living jungle. Called the Maiden's Tangle, it violently grows ever-forwards. Strange creatures and apparitions plague its feral denizens and borders, supposedly a result of the moon and sunshards that fell onto Moondown's lands.