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Public restrooms outside of restaurants, hotel lobbies, and tourist attractions are rare in Boston, but you'll find clean, well-lighted facilities at South Station, Faneuil Hall Marketplace, and the Visitor Information Center on Boston Common.
The Bathroom Diaries. The Bathroom Diaries is flush with unsanitized info on restrooms the world over—each one located, reviewed, and rated. www.thebathroomdiaries.com.