Taupo bungy is great-- it's where I did my first bungy jump! 47m over the Waikato River. Or the Auckland Harbor Bridge has a jump that is 40m. At both you can do the water dip option, which is very refreshing/scary! I also recommend doing the "SkyJump" off the Auckland Skytower. If you road trip to the northern tip of the island it's super lush and jungly which is cool, and the 100 mile beach up there, right by Cape Reinga has MASSIVE sand dunes you can "duneboard" down. Sounds iffy, but it's actually amazingly fast, (you rent super slick boogie boards to go down on). You can go Zorbing in Rotorua...not adrenaline inducing, but extremely fun/weird all the same. Hope this helps! HAVE FUN!.

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New Zealand & the Pacific Travel Forum
New Zealand & the Pacific Travel Talk