The busiest one of these in the world is in North Carolina. What is it? By Nancy Flagg | Aug 9, 2017 @ 8:10 AM August 8, 2017 Q: The busiest one of these is in North Carolina. What is it? A: Domino’s Pizza RELATED CONTENT Of The Foods That Make Us Happy, Chocolate Is #1. What’s #2? The #1 Thing You Should Never Wear On A Date Is Wrinkled Clothes. What’s #2? Doing This Takes More Computing Power Than The Moon Landing In 1969. What Is It? We Used To Do This Twice A Day…Now Only Once. What Is It? QI: This American Household Staple First Appeared In 1937. What is it? QI: This causes people to panic about 3 times a month, on average. What is it?