Purchased a National Parks Annual Pass some months ago as well as a Passport, and have been going out of our way on trips to visit National Parks ever since.
Brandywine Falls does not disappoint; it is absolutely gorgeous. Ohio's second highest waterfall is a natural splendor.
The paths are shaded and not too long, which makes it a nice spot to visit no matter how hot the day. If you desire (and don't heed the warnings on the signs) you could even hike down to the stream and get pictures of the falls from the bottom.
Brandywine can be a very quick stop, and is definitely worth it. Locals and visitors take note: if you haven't been here yet, you're missing out.