1. The Cage of Death (Australia)



Without the cage you wouldn't stand a chance swimming with a massive saltwater crocodile. But for brave punters who still want to get cozy with a feisty croc, a new Australian tourist attraction is offering the chance for a close encounter in the safety of a clear acrylic box dubbed the 'cage of death.'
 
Just 4cm of acrylic, a pair of goggles and a swimsuit, separate thrill seekers from the jaws of Choppa, a saltwater crocodile. The cage has no bars, unlike cages used in shark dives, which prevent the reptiles from gripping on, but deep tooth scratches are visible on the sides, deterring some hesitant participants. Top End tourists climb into the clear box before being lowered into Choppa's lair. They then spend 15 minutes inside the 9ft high cage and watch Choppa, who lost both front feet while fighting other crocodiles, try to take a bite out of them.
 
The attraction at Crocosaurus Cove, in the heart of the city of Darwin in the Northern Territory, has been given high marks by adrenaline junkies.

3. Iguazu Boat Ride (Argentina & Brazil)



Taller than Niagara Falls and twice as wide, the Iguazu cataracts are one of the most impressive sites that you will ever see in your travels around the world. 275 waterfalls cascade through the Argentine and Brazilian parks and once you see the Devil's Throat you won't regret the trip.

For 15 USD you can take an Iguazu boat ride that will allow you to thumb your nose at the visitors in both countries, as you motor right into the fury of the monstruous falls. Not only will you get absolutely soaked and feel, up close, the power of the falls, but you also get bragging rights, because no matter how you phrase it, the fact that you took a small boat and motored into the dump zone to receive a sheet of water from some of the biggest falls in the world, is undeniably sweet.

Note: In 2011, two US tourists were killed and five people were injured when one of the boats overturned. Seven tourists from the US, Germany and Colombia were sightseeing at Iguazu Falls in northern Argentina with a crew of three when their boat hit rocks and flipped over.

5. Volcano Bungee (Chile)



If throwing yourself off a platform with nothing but a bouncy cord tied to your feet is a bit too lame for you, then you're a candidate for the wildest bungee jump we've ever heard of: the Volcano Bungee near Pucón, Chile. Basically you get flown up to an active volcano--yes, we mean a bubbly, smokin' volcano--and then you have to bungee jump off the helicopter into the caldera towards the molten lava. Are these people insane?
 
Anyone thinking that throwing themselves into a volcano sounds fun also needs to be fairly well off. You can do this bungee jump as part of a six-day package for $9,995, including accommodations and other (slightly less crazy) activities.