Making a discovery

Saturday, at the place I usually go, I discoverd something that I did not expeced.  There is a closed place that was open that day.  I entered it and discovered that it was leading to office.
Here what I am talking about:
First, the entrance look like the front of a house:

Once entered inside, there is a big room that lead to the various offices:

There was more office there that I thought it would.  I would never had guess there was office in there.  It was nice discovering that.