Iowa and ‘large items’

From a news report covering the installation of the “world’s largest watermelon sculpture” in Muscatine in Iowa:

Iowa is no stranger to large items. Among our claims to fame, we're home to the world's largest bull in Audubon, the world's largest manmade grotto in West Bend, the world's largest popcorn ball in Sac City and the World's Largest Truckstop in Walcott.