Okay...this movie made NO sense.
I just saw the DVD release of this movie, and I'm totally baffled. What the heck happened? It starts off with these kids who go into a cave, including a dork who reads comic books instead of being worried about how he'll get out or how he'll get food to eat. Then they get to "Atlantis" and the movie goes to hell. Nothing makes any sense after that, and then it abruptly ends at only an hour and ten minutes long.
Did a lot of footage get cut out? Did the director run out of money halfway through the film and couldn't complete it? I just don't get it.