Probably the coolest thing I've ever done. About 10 years ago, I took my kayak out on the Gulf just east of Fort Pickens. Mid-spring, gorgeous day, pretty calm. I was a few hundred feet offshore and looking out at deeper water where a pod of dolphins were working their way westward, smoothly breaking the surface to grab a breath and rolling under again without much of a splash. There were nearly a dozen of them.
Then I heard a blowing sound behind me, toward the shoreline, and turned to see three of them maybe 20 feet away.