The hunt for hidden treasures was underway Thursday as shoppers browsed vendor booths up and down North Main Street in Celina during the opening day of the annual U.S. 127 Yard Sale. Spanning 690 miles through six states, the four-day event - also known as the "World's Longest Yard Sale" - offers everything from vintage finds and antiques to one-of-a-kind treasures. The annual sale will continue through Sunday.