What's the neatest thing you've seen on a trip in the last year?

I'll leave it up to you to define "neatest," but tell us what made it stick in your memory as a high point.

For me, two leap to mind:

At Zaleski, in southeast Ohio, hiking out the last day, we passed a tree in which large knotholes formed a perfect "Scream" face. (I don't take many pictures, but my partner on this trip sent me one. I don't have an online repository to link to; if you'd like to see it, PM me with your email address.)

At Carter Caves, in Kentucky, we were hiking just as the last freeze was ending. There were large icicles (several feet in length) hanging from the tops of the cliffs and the rock shelters where it was still shady. As the day went on, sunlight reached these places, and they melted just enough to start falling. I'd never seen icicles fall before. Pretty neat, and fortunately none were overly close.