The water in Crater Lake was very smooth when we were there which made for great reflections of the rim of the caldera.  One the other side of the crater, there was a snow bank on the side of the bowl which looked like a parallelogram.  With the reflection in the water, I thought it looked a bit like an arrowhead.  I am not much of a visionary when it comes to abstract images but even I saw this and thought it looked promising.