As we ferried through the Sound, if you looked South you could see the skyline of Seattle and the Space Needle on the horizon with a looming Mount Rainier in the background. I wish I had gotten a picture but the photos don't even do the scene justice.
During our half an hour layover we walked a little ways away and there were a few shops and restaurants. Since it was a relatively warm day we got some waffle cones and ate them on the ferry on the way back.
It was a lovely way to spend the last day of my best friend's visit. :)