Parking at a spot near the edge of an Arizona canyon where the Colorado River makes a sharp U-turn now comes at a cost. You can blame that mostly on social media.
Countless posts have celebrated the wonder of Horseshoe Bend, where the bluish-green river takes a 270-degree turn just outside the town of Page, near the Utah border. Photographs on Facebook, Instagram and elsewhere show tourists dangling their feet over a more than 500-foot (152-meter) drop, staring contemplatively or throwing their hands in the air...