The black waterfall. You reach it after 30 min hike from Skaftafell camping. It's a perfect morning hike if you wake up here after having camped. From here you can either go back or continue higher up, there's lots of nice hiking routes here. Before you start walking, check in with the visitor's center to see the map and get ideas on all the trails that are available here.

Note that the hike to Svartifoss is almost entirely uphill and can be challenging for some.