What exactly do you mean by - Visit the container terminals of Europe's third busiest port ?

It's not like you could walk or ride around in there, and you shouldn't either.

It's all fenced, secured.

There are a few vantage points from where you can see into them, from afar, or the other side of the river, but that's it.

Drones? Uh Oh! Better not! Lingering around the fences to get a better view? Are you trying to find the smuggled drugs in some container? Trespassing into some empty quay which has recently been torn down, then elevated, now lying empty, to explore the growth of so called 'pioneer plants'? Better not, because signs say fine is 1000EUR. GULP!