▁Mount ▁Olymp us . ▁ ▁Gi ants ▁The ▁G ig antes ▁( also ▁called ▁the ▁Great ▁Gi ants ) ▁are ▁giant - like ▁be ings ▁that ▁were ▁made ▁by ▁G ae a ▁and ▁T art arus ▁to ▁over throw ▁Olymp us . ▁They ▁were ▁previously ▁defeated ▁by ▁the ▁gods ▁and ▁Her acles ▁during ▁the ▁Gi antom ach y . ▁Each ▁was ▁meant ▁to ▁opp ose ▁a ▁specific ▁god . ▁They ▁can ▁only ▁be ▁defeated ▁by ▁a ▁god ▁and ▁a ▁dem ig od ▁working ▁together . ▁The ▁Gi ants ▁are ▁described ▁as ▁very ▁tall ▁with ▁drag on - like ▁legs ▁and ▁sh ag gy ▁hair . ▁▁ ▁Al cy one us ▁– ▁A ▁ 4 0   ft . ▁G ig antes ▁with ▁rust - color ed ▁drag on - like ▁legs ▁whom ▁Haz el ▁Le ves que ▁almost ▁res ur rect s ▁during ▁World ▁War ▁II . ▁Al cy one us ▁eventually ▁r ises ▁in ▁The ▁Son ▁of ▁Ne pt une . ▁He ▁is ▁inv inci ble ▁as ▁long ▁as ▁he ▁remains ▁in ▁his ▁hom eland ▁which ▁after ▁his ▁res urre ction ▁is ▁Al aska . ▁Frank , ▁Haz el , ▁and ▁Ar ion ▁defeat ▁him ▁after ▁driving ▁him ▁into ▁Canada . ▁He ▁oppos es ▁H ades / Pl uto . ▁ ▁C ly ti us ▁– ▁A ▁ 2 0   ft . ▁G ig antes ▁with ▁ash - color ed ▁drag on - like ▁legs . ▁He ▁oppos es ▁H ec ate . ▁C ly ti us ▁appears ▁in ▁The ▁House