Really worth the short drive down a gravel track. Cheap entry fee ($15 pp), informative guide, quite caves (unlike Waitomo, which are now busier than Piccadilly circus), and a great close up view of the glow worms. OK, it doesn't have the boat ride you get at Waitomo, but equally, you won't be fighting for space to get a good look. Exceeded our expectations. Drop in on your way up to the Bay of Islands, you won't reget it.