If you live or plan to visit the United States, and Cali, Ohio, NY, Ontario, MA, IL, Oregon, PA, MN, GA, WA, or DC precisely, you will find this site very helpful when nature gives you a call. The site is MizPee
I haven't had the pleasure of visiting other cities in the US, but know enough of NYC. If you gotta go in the middle of the street, you have three choices; ignore it, hold it, or let it go. There aren't public restrooms and the story goes way back to the 1990s. Have a look
Thankfully, this season, NYC is trying to accommodate locals and visitors alike with 20 posh toilets. Actually, they are temporary and organized by Charmin, not the City of NY, and at Times Square only!
Anyhow, if you or someone you know ends up here or in another metropolitan city in the US, help them to MizPee. The website contains addresses to the public restroom in the vicinity of the place that you specify, reviews, suggestions, chance to add toilets, send the ones you find to your cellphone and even "looisms", or toilet trivia
Amusing idea and very very helpful