we're having to take a bangka, a traditional boat in the philippines, that's narrow enough for gaps like these. it's just through there. watch your head! one more! on the way to the jellyfish sanctuary, we stop off at the luminescent cave that is popular with tourists. but the only way to get access is underwater. it was really frightening, not seeing where you are going, but once you're in here, it's just such an amazing experience.