Spider pits are pit-like structures in which reside some spiders and a couple of Orcs. They come in two variations: * The Mordor spider pit contains Mordor spiders and a Mordor spider keeper. They are only found in Nan Ungol, in the southwest corner of Mordor. * The Dol Guldur spider pit contains Mirkwood spiders and a Dol Guldur Orc holding a lead.