The deep water.
The deep water. If you look closely, you can see, under about 30" of very cold snow melt, the stepping stones which ensure your ability to cross the outlet of Tenaya Lake without getting your feet wet. :)
I forgot to take the (non-waterproof) topo map out of my pocket before this crossing, so I spent the next several miles walking with it in my hand to dry it out before it turned into mush.