That's a tough topic. The first thing that came to mind was a flower. But I've been posting lots of flower photos lately. I wanted something different.
Going back through my photo archives, I hit gold. Oregon is rich in waterfalls, and I've got many photos of lovely cascades. The above image is Middle North Falls located in Silver Falls State Park. This lacy cascade is especially fetching in the spring, when snowmelt swells the water volume, and everything is a rich shade of green.
Check out more wonderful images here in Gallery 15 of the 52 Photos Project.