Photo: Grafé Lecoq
Source: https://www.facebook.com/grafelecocq/photos

Around the citadel of Namur, there were 3 tram tunnels, 2 of which can be seen in the photo. Two of them were sold or leased to a wine merchant after the closure of the line.
He's still very happy with this particular location and this because of the constant, ideal temperature there.