Huldufólk

Two guides referenced the fact that 60% of Icelanders believe in "Hidden People." There are Elves, which are benevolent beings. One said that when building a road, if equipment breaks when trying to move a stone, it is a sign that Hidden People live there and the road is detoured from its original path. There are also Trolls, which are malevolent. Apparently they come out at night and are petrified if they are caught in daylight. Such stones were pointed out during their tours.

A troll who did not make it to a cave before first light