Drápufoss is an unknown waterfall in the south of Iceland, not far from Hvolsvöllur. The river Kvoslaekjara tumbles down over 20 meters in a beautiful landscape. I am not sure how to you reach the fall, there isn’t much information available about this fall and you can’t find it on a map.
It should be East of Hvolsvöllur, driving on road 261. After 10 kilomters there is a road to the left towards Lambalaekur. At the end of the road you have to follow the river for a while.