A great chasm in the earth, this awkward scar in the ground is recent. Descending this darkness (might cause Amnesia) won't be an easy task, considering the more-or-less 90 degree angle; and once you get down, not only are you faced with complete and utter darkness; the largest Creepers are known to reside here, as well as the Hunters; a freaky almost-Abomination type quadrupedal creature, Hunters stalk their prey with unnerving stealth before pouncing and tearing it to shreds with vicious claws. And Creepers just blow s**t up for fun. So go ahead, explore underground. It'll be fun.