Continuity mistake: One of Herc's shoulder clasps come undone during the Cyclop's fight. After the Cyclops drops him into the cart, the clasp is done up again.
Continuity mistake: Hercules has his ribbon around his neck in the temple. As he's praying, a wind suddenly blows up. The ribbon around his neck is gone when this happens.
Continuity mistake: In the scene where young Hercules is pulling the cart of hay, his's adopted father and the donkey are riding on the seat and both are holding onto the sides of the seat since they're going so fast. Once they stop, Hercules's adapted father mentions the donkey's hurt foot, and she's now got a sling on the left front leg which wasn't there during the wild ride.
Continuity mistake: In the scene where Hercules is hiding behind a curtain from all the ladies Meg pulls down the curtain and Hercules only has one gold band.In the next shot Hercules has two gold bands.
Answer: I always assumed one of the gods told him how to get there after they won the battle. The underworld in Greek mythology could be traveled to by mortals, albeit extremely ill-advised.
Jordan Oxendine