Where are the photo ops in Warren County?

I've been all around the county with a camera, but I don't tend to stop and smell the roses, if you will.

Where are the best places to take a short to medium walk and find a decent photo and/or have a picnic?

Streams, waterfalls, trees, curious architecture, interesting old broken stuff, overgrown stuff, other... What's out there and not so good it's secret?