Archery practice field
Percy Jackson tries to find out if he is a child of Apollo, but soon realizes he is not. He also realizes that Chiron is very forgiving, even when he has to get one of Percy's stray arrows out of his tail.
Percy and Grover Underwood pass the archery field when Percy had just come out of the infirmary. A row of archers were preparing to release their bows before Grover stops them. Percy nearly runs into them a second time before Grover (who had managed to get out of the Underworld) stops him again.