The hiking adventure through the cave is almost as...

The hiking adventure through the cave is almost as worth it on its own separately from the very cool glowworms. You get to jump off a couple of waterfalls and see some truly impressive sections of the cave and float in complete darkness for a stretch. Beware that even with the wetsuit, your exposed hands and face and even your covered limbs are quite cold by the end (during which time you've probably spent 90 min in the cave). But warm showers are provided after that feel fantastic -- consider bringing soap to shower off the cave smell.