There is a wonderful hiking trail along the Niagara River which can be accessed from the Niagara Glen picnic area via a metal staircase. The trail is heavily wooded and well-travelled yet there are usually very few other hikers on the trail. The trail from the stairway descends the gorge down to river level via several routes. My favourite spot on the trail is Devils Hole Rapids immediately beneath the picnic area at the Glen. It is possible to sit right beside the rapids on some very large white quartzite boulders and watch the jet boats pass by. This is the narrowest point in the Niagara River with Class 5 rapids and a large hydraulic drop caused by the constriction in the river. I try to visit this spot at lunch time and have a picnic on the rocks. This is possibly the best picnic location in eastern Canada!
For all the geoscientists out there, this is also a great location to study the sedimentary rocks that make up the bedrock of southern Ontario. It is also an important location for study of the history of the Niagara Gorge.