re , ▁while ▁it ▁is ▁clear ▁from ▁her ▁name ▁that ▁the ▁fair y ▁queen ▁in ▁question ▁is ▁Morgan ▁le ▁F ay , ▁the ▁rich ▁under world ▁que end om ▁of ▁which ▁she ▁is ▁the ▁mist ress ▁is ▁accessed , ▁not ▁through ▁a ▁fier y ▁gro tto ▁on ▁the ▁s lop es ▁of ▁Et na , ▁but ▁through ▁a ▁' f ount ain ' ▁( i . e ., ▁a ▁spring ) ▁– ▁a ▁circumst ance ▁more ▁in ▁keeping ▁with ▁Morgan ' s ▁original ▁wat ery , ▁rather ▁than ▁fier y , ▁associations , ▁before ▁her ▁incorpor ation ▁into ▁the ▁fol kl ore ▁of ▁Sic ily . ▁For ▁another ▁Sic ilian ▁conception ▁of ▁the ▁fair y ▁real m ▁or ▁castle ▁of ▁Morgan ▁le ▁F ay ▁– ▁see ▁F ata ▁M org ana ▁( mi rage ) ▁re . ▁an ▁optical ▁phenomen on ▁common ▁in ▁the ▁Stra it ▁of ▁Mess ina . ▁ ▁History ▁of ▁vol can ic ▁er u ptions ▁ ▁Ge ological ▁history ▁ ▁Vol can ic ▁activity ▁first ▁took ▁place ▁at ▁Et na ▁about ▁ 5 0 0 , 0 0 0 ▁years ▁ago , ▁with ▁er u ptions ▁occurr ing ▁beneath ▁the ▁sea ▁off ▁the ▁ancient ▁coast line ▁of ▁Sic ily . ▁About ▁ 3 0 0 , 0 0 0   year s ▁ago , ▁vol can ism ▁began ▁occurr ing ▁to ▁the ▁south west ▁of ▁the ▁sum mit ▁( cent re ▁top ▁of ▁the ▁vol cano ), ▁then ▁activity ▁moved ▁towards ▁the ▁present ▁centre ▁ 1 7 0 ,