A few weeks ago I had an appointment in a nearby town. The town is very crowded, the streets are narrow, parking is impossible and virtually everything is hard to find.
Lucky for me I've been there many times. I spoke to the receptionist and she confirmed the directions and told me I could use the staff parking. In closing she mentioned that the parking was behind the building so I should use the back entrance. "You can't miss it" were her famous last words.
Well the parking was at the side, not the back. And there were 6 unmarked brown doors with giant trash bins blocking them.
Now - THIS is an entrance you can't miss. Same town, different building.