What Should I Do If I Have One Day in Yellowstone?

If you're looking for a book of highlights around the park, this is a great reference book. It's organized into a collection of “focused days” each revolving around a specific topic: animals, photography, kids, birdwatching, fishing, geothermal features and more. As we drove around the park, we had this book handy and combined various days to create our own schedule.