They might want to put up a sign or something

There are just so many things wrong going on here that I'm really not sure where to start...

A mayor in Germany helped rescue a man who became trapped in a women's prison after mistaking it for a shortcut to a nearby park, police in the northern city of Hildesheim said on Wednesday.

[...]

The man told police he was strolling through town and did not immediately notice he had walked into a prison. By the time it dawned on him where he was, the gate to the jail had already closed, locking him inside.

Okay, first of all, either this guy needs to be considerably more aware of his surroundings (seriously, is he Mr. Magoo or something?) or the authorities need to label their prisons a lot better. I understand that the Germans may not be comfortable with lots of barbed wire and guard towers, but people really should be able to figure out when they're walking into a prison. At least make it look kind of prison-y.

And that brings me to another point, which is that you should not be able to just casually stroll into a fucking prison. One would think that there would be guards at the gate asking people who could potentially be smuggling contraband items into the facility for some identification. Also, if you can just wander in mistakenly without any guards noticing, what's to keep you from wandering out on purpose?

Finally, why did the mayor have to get this guy out after he was mistakenly locked in? Couldn't he have approached some sort of prison official and said, "Say, I'm not a woman and I seem to have been mistakenly locked in your correctional facility for women"?

I'm beginning to suspect that this is not the best-supervised (or staffed) prison in the world.