<P> The trio heads out , locating the first pearl at an old garden center before they suddenly encounter Medusa , who tries to kill them until she is decapitated by Percy ; they take her head with them for later use . They locate the second pearl in the Parthenon in Nashville ; Percy uses the winged shoes to take it from a statue of Athena . However , they are then confronted by the Hydra , which Grover turns to stone using Medusa 's head . The last pearl is located at the Lotus Casino in Las Vegas , where the three eat lotus flowers , which make them forget their reason for being there . They stay in the casino for five days until Poseidon speaks in Percy 's mind , helping Percy return to his senses . Percy frees Grover and Annabeth from the effects of the flowers and they flee , discovering that the casino is run by the Lotus - Eaters , and they had been keeping people captive since ancient times . With all three pearls , Percy , Grover , and Annabeth head into the Underworld , the portal to which is located in Hollywood . </P>
<P> The trio heads out , locating the first pearl at an old garden center before they suddenly encounter Medusa , who tries to kill them until she is decapitated by Percy ; they take her head with them for later use . They locate the second pearl in the Parthenon in Nashville ; Percy uses the winged shoes to take it from a statue of Athena . However , they are then confronted by the Hydra , which Grover turns to stone using Medusa 's head . The last pearl is located at the Lotus Casino in Las Vegas , where the three eat lotus flowers , which make them forget their reason for being there . They stay in the casino for five days until Poseidon speaks in Percy 's mind , helping Percy return to his senses . Percy frees Grover and Annabeth from the effects of the flowers and they flee , discovering that the casino is run by the Lotus - Eaters , and they had been keeping people captive since ancient times . With all three pearls , Percy , Grover , and Annabeth head into the Underworld , the portal to which is located in Hollywood . </P>
how long were percy grover and annabeth in the casino
how long were percy grover and annabeth in the casino
five days
five days