Pretty atmospheric bridge, isn't it?
It's a railway bridge called " La Rampe du Lion" (lion's ramp). You get there by the avenue Zénobe Gramme (inventor of the industrial dynamo).
The romance of industry ...?
Don't be fooled - the smoke you see is no genuine smokestack industry stuff. That eternal smoke plume is rather a constant reminder of the waste we produce (those are exhaust fumes of an overworked waste incinerator).