 Before reaching the Quad Cities , I @-@ 80 passes Walcott and Iowa 80 , which is self @-@ billed as the " World 's Largest <unk> " . The 65 @-@ acre ( 26 ha ) truck stop has three restaurants , a gift shop , movie theater , museum , barber shop , and dentist on site . On average , the truck stop has served more than 1 @.@ 4 million customers per year since it opened in 1965 . 
