There are a number places I jerked off that are memorable.

In the female staff's washroom, cumming in the sink knowing that some of the hot women coworkers washed their hands there.

Shopping mall parkade, standing outside of my car.

In a warehouse's nurse's office.

I used to go to a park where I would sneak into the women's washroom and pick a stall. I would then strip naked and masturbate until cumming. After that I would dress and sneak out of the washroom, never getting caught. The thought of getting caught was a turn on.