New England Aquarium
Central Wharf, Boston, MA
75% positive
Directions: The bathrooms on the 2nd floor, next to the cafe, are single-person locking.
Comments: They are marked as \\\"family\\\" bathrooms, but individuals without kids use them all the time. As far as getting to them - you can actually go to the cafe (and therefore the bathrooms) without paying. Unless you are in a wheelchair - it is only elevator accessible from inside the Aquarium exhibit halls.