Airports, parks, stadiums—where are the nation’s filthiest public toilets? An unscientific survey of the country’s shared facilities finds that a single porta-potty at a playground is the absolute worst, followed closely in revulsion by a row of porta-potties, a dog racing rack, and the back of a long-distance bus.
https://deadspin.com/americas-worst-public-toilets-ranked-493769603
