We were hiking a trail that led from Pebble Creek Campground in Northeast Yellowstone National Park. We could see a shallow cavern on the far side of the creek, and we wanted to explore it. Somehow, my father was able to make it across the creek (likely by wading in his hiking boots). No one else in our group, however, was willing to get our feet wet trying to cross the creek. Dad, however, looked for other ways to get us across, mainly by pushing a large branch into the creek, in an attempt for it to get caught so we could use it as a bridge. Alas, the branch broke on impact and floated away downstream. We did, however, make it to the other side without wet shoes.