Yellowstone National Park: A Cautionary Coloring Book

Color me cautious... or color me dead!

For many, a visit to Yellowstone National Park is the vacation of a lifetime. Where else can you stare into the Grand Canyon of the Yellowstone, watch in wonder as Old Faithful erupts on cue, come face-to-face with a lumbering bison, or, hey, be boiled alive in a thermal pool? Perhaps you'd prefer to be torn apart by a grizzly bear during a peaceful morning hike?

Yellowstone National Park offers its visitors more spectacular natural wonders—and as many w...