I was hoping someone could tell me.
I think it might be some kind of buoy. The white bit on the underside has figures on it, like the things you see in fords to tell you how deep it is. And the (military-looking) vehicle looks as if it's equipped with gadgetry to pick the thing up from above (e.g. parked a quayside, it can reach down to the water). The cone covering the RH end looks like a temporary covering.
fairground equipment
Google image search suggests "tourist attraction"