Courtesy of Cintas
The walls in this Kansas museum restroom are carved from a 275-million-year-old stratified salt bed.
The contest, hosted by corporate supply company Cintas, accepts nominations from all over the country. This year's winner will be announced at the end of fall.
From a 50-foot toilet in the middle of an Alabama park to a bathroom plastered with "The Far Side" comics, these are America's best restrooms.