In  the  southern  part  of  Theth  Park  is   Grunas

Canyon,  known  as  a  natural  monument.  The Grunas Canyon has huge carbonic formations. The canyon is about 2 km long and 60 meters deep, ranging from 2-3 meters wide to 30-40 meters. There  is  an  incomparable  beauty where  there  is always enough water for canoeing enthusiasts. The water of Theth’s is crystal clear at all times and quite cold. It is not advisable to visit the canyon without being accompanied by the inhabitants of the area, it is also advisable to visit it in groups. The canyon of Grunas has been and is a challenge for  all  foreign  tourists and Albanians who are Canyon enthusiasts.