Cache should be an easy find near the Upper Falls Picnic Area. This area can be the beginning of some great hikes and adventures for you. For instance, from here you can cross the river and take a short hike up to Upper Falls. Feeling a little more adventurous? Find the little trail leading south west from the falls that will lead you to a neat spot that veteran hiking cacher Slinkteam6 has dubbed "Upperest Falls" (see GC6P5JW). It can now also serve as the beginning of a new adventure, retracing my steps in an ultimately unsuccessful attempt at being the first to find the Upper Upper Falls Adventure cache (GC6PNBN).
In April 2018, my brother gifted me a premium geocaching account and we went on a caching spree with our kids from Nunn's park to the Upper Falls cache (GC4G1FW). While there, my brother first spied the Upper Upper Falls Adventure cache, which had been placed by The NightFox almost two years prior and was still unfound! Looking at the description, it became obvious why! The cache description page makes clear the rigors and risks that would be required to retrieve the cache, so we did what any sensible person would and wrote it off.
But that is not where the story ends! If you are curious of what happened next, check out the Upper Falls Saga 2!