I even went orienteering - from the village of Gjógv,
(one of the 'controls' was misplaced), the village website says:

"The trip also takes you to the refreshing water spring at Háls - a favoured resting place for the local shepherds. You look down on Ambadal, a beautiful valley all covered in grass except for a single stone, Festirsteinur/Festarsteinur, which, of course, also has its own story..."

Unfortunately I can only find the story in Faeroese.