Glen Onoko Falls Access is one of the major put-in and take out areas within the Lehigh Gorge State Park (Luzerne | Carbon, Pennsylvania). Besides great access to the river, you will find a few other interesting areas. Like the "hole in the wall" (which is an old train track going through a mountain), the Glen Onoko Falls them self, and the bike/walking tow path along the river.
To access the falls, park in the main parking lot and head down towards the hole in the wall. You'll see a sign explaining how dangerous this place is, and that the trail goes under the bridge. Follow the signs and you'll be there in a few minutes.
This parking lot gets Full Fast. And I did witness a meter maid giving tickets for anyone not in a spot both times that i was there. So get there early.