6Volcano Tours, Hawaii

Plenty can go wrong on a volcano tour in Hawaii.

Unprepared hikers easily get lost and fall victim to the dangers, and the volcanoes put plenty of others in harm’s way by spewing flying rocks and boiling nearby ocean water. Tourists also have to worry about lava laze, a toxic combination of hydrochloric acid, hydrogen sulfide and carbon dioxide that can cause breathing, eye and skin problems. Helicopter tours are dangerous too, considering choppers have been hit by flying lava and crashed. In fact, in the past 30 years, 60 helicopters have crashed, causing 17 fatalities

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