subway wandering in antwerp

When arriving Antwerp, as usual, I tried to go to the center of the city without knowing the exact place and how far it was from this beautiful train station. Wandering the station, I found the entrance of the city-subway, or the quasi-subway, like-a-tram.

The name of the subway-stop in the central station is "diamond". Brilliant. So, decided to go, why not.

Then, for a while, actually I found myself around the outskirts of the city, seeing the guys in the bar drinking heavily with red faces around noon.
Simply, I took the wrong line.

Here was the outskirts of Antwerp.