I'm probably too easily amused, but from the first time I saw this intersection nearly three years ago I thought this was just incredibly funny.

Click on the picture for a higher resolution view.

What is accomplished by not having a sign that shows where the road straight ahead leads to?  Sure, it's weapons grade plutonium processing facility and nuclear power plant.  So what?  Anyone that might be interesting in attacking it is going to know that even if there isn't a sign saying:

Nuclear Plant Ahead
Proceed with Caution
Snipers at Play

<Shrug>  Whatever.  It still makes me smile every time I drive by.