Fantastic. Pair of us did the Black Labyrinth expe...

Fantastic. Pair of us did the Black Labyrinth experience and highly recommend it; have heard that the longer Abyss tour is also excellent if you have the cash. It's well set up and the guides were great fun. Nice group size, not too big. They give you a fun training session in a stream then go straight to the caves which were extremely beautiful and packed with glow-worms. Made a few stops on the way to learn about them and eat free chocolate. The trip requires a certain level of fitness but really isn't very taxing. Wet suits keep you warm and the soup & bagel at the end are well worth it. They don't let you take cameras/phones (which I quite liked) and there is a fee if you want their photos at the end but they let you split it between everyone so it cost us $3.50 which wasn't too bad at all. Had a really good time - if you're in the Waikato or travelling through, definitely stop in.