By far the coolest thing we've done in New Zealand...

By far the coolest thing we've done in New Zealand - we did the Abyss tour which was 5 hours of spelunking and rafting with a little rappelling and zip line mixed in. The water is freezing, and you'll be exhausted by the end but the crew know this cave like the back of their hand and when they they shut off the lights and tell you to jump into a pitch black void, you won't even second guess it.