The A.B. Young Trail leaves from the southernmost end of the Bootlegger Picnic Area in Oak Creek Canyon north of Sedona… https://www.rawpixel.com/image/9648528/photo-image-plant-fire-leavesFree Image from public domain licenseOne of what are fairly common bear-crossing signs in California's Sierra Mountains. Original image from Carol M.… https://www.rawpixel.com/image/434159/free-photo-image-carol-highsmith-california-bearsFree Image from public domain licenseBuffalo-crossing sign in the vast Wyoming portion of Yellowstone National Park. Original image from Carol M.… https://www.rawpixel.com/image/434479/free-photo-image-sign-yellowstone-national-parkFree Image from public domain license