Brilliant Aragog's Lair
Forbidden Forest, Hogwarts
Aragog, along with his wife, Mosag, sired a sizeable Acromantula colony in the Forbidden Forest. Having been raised by Rubeus Hagrid, Aragog instructed his many children to do Hagrid no harm. Anyone else who wandered into their den would inevitably find themselves pursued by hordes of young Acromantula.