Interesting outdoor places near Columbus

I'm trying to take advantage of the nice weekend weather and do some exploring/photography around Columbus. Does anyone have any suggestions for some places that aren't very well known? Anything will work-- small waterfalls, bridges, interesting landmarks, old buildings (not really into urban ex), scenic views, etc. Truthfully I am not familiar with a lot of the parks around here either, so if there is anything interesting in one of the parks I would love to hear about it. Thanks!