The Blue Hen Falls Trail in Cuyahoga Valley National Park, OH, is an easy 0.4 mile out-and-back hike down to the falls.
Blue Hen Falls is an overhanging plate of sandstone protruding from the underlying shale with a 15 foot waterfall. The hike is short and easy, but there is a small semi-steep hill you have to hike back up to get to parking, so this trail is not fully accessible.
When you reach the lookout point above Blue Hen Falls, you'll find a small trail that also leads down to the falls. Hiking down gets you a different perspective and you can even hike behind the falls.