If you are looking for a way to increase your adrenaline - you will find it in New Zealand and more than likely in Queenstown. The Kiwi's are always finding new ways to thrill and push the limits of the laws of physics and gravity and get people to pay for it! Where else can you jump off bridges connected only by a rubber band or ride jet boats through narrow canyons? Unfortunately (or maybe fortunately?) we didn't have time to try the other adventures available such as -

Caving. Not your normal spelunking. Noooo. It has been described as a combination of Indiana Jones and being flushed down the toilet.

Zorning. Think large clear beach ball and hills. Now picture yourself inside the beach ball rolling down the hills. You roll until the ball comes to a stop. Think nauseous.

And of course the mundane - parachuting, white water rafting, paragliding, etc. etc.