Taking picture of a bathroom/restroom is weird, I will give you that. But when you are drawing these things, usually several times per project, you come to know what the standards should be, and you end up looking at the bathroom fixtures. I usually end up looking at buildings and building systems in restaurants and offices, much more than the average person –including bathrooms.
3 grab bars.
Lavatory (sink) has compliant 15″ clearance on both sides of sink, you can image a 30×48″ rectangle centered on the sink to allow clear floor space on the bathroom floor, to allow for wheelchairs. Also pipe guards are required
National Forest Service
Zaha Hadid Bathroom at Broad Museum
Shirgeru Ban Bathroom.
Herzog and de Meuron, Perez Art Museum
Other common graphics and dimensions for bathroom design.