Grotto is a gigantic cave in the Vale region. It much to be explored, as only about a sixth of it has been mapped out. It has intricate tunnel systems and barely any open space, making it easy to get lost in without a map. It is fairly damp, making it a hot spot for cave life. It's a major spelunker attraction, as several hundred spelunkers go in to explore it every year.
A complete list of known creatures that inhabit Grotto.