Location is Washington state, USA.

I've been at this company for less than a week and I hardly know everyone yet. I had to go to IT today to get some stuff set up and the sysadmin had all the security cameras in a 4x4 grid on a TV. While he was working on my laptop, I noticed that two cameras show the mens and womens restrooms. They're on the ceiling overlooking the stalls so you can see into them. I didn't say anything about them at the time because I'm not sure what to do. I went back and found the camera in the mens' room, it's inside an air vent so it's very hard to notice, while none of the other cameras outside are hidden.

I'm not sure if this is known by the whole company and it's just accepted, or if it's legal at all. I'm definitely not going to work for a company that does this. I'm trying to decide if I should:

1. Go to the sysadmin and ask him about it.
2. Go to my manager and tell him, in case these aren't actually approved.
3. Leave the company. I'm not worried about finding another job, and if I did this I'd email my whole department and let them know, then walk out.
4. Alert some legal authority.

Does anyone have any advice for the best way to handle this?