The same happens here in California. About 40 miles down the road from me is a beautiful area full of Redwood trees, a cool running river and sandy beaches, where camping and hiking is very popular. Yet, every year a few go missing in the mtns. just above this very beautiful area and are either found dead from dehydration, this with fresh water springs bubbling all over the mtn. (also heavy metal springs), or they wander further inland into some of the most rugged terrain to be found and either fall to their deaths or break a leg and become lion food, or just plain go missing. Never to be seen again.
The ill prepared and inexperienced really don't stand much of a chance. Even in paradise.