New Zealand
There are a range of trips on offer, there is the normal tourist trip to the glow worm caves and there a range of more adventurous ones the best of which is Blackwater rafting: floating through the caves in a wet suit on an inflated rubber ring.
www.waitomo.com
585 Waitomo Caves Road, Waitomo Otorohanga 3977, New Zealand
+64 7-878 6219
Google map: bit.ly/onFs8C