and noblessner port, imperial russia's submarine factory, is fast becoming tallinn�*s new leisure district, bars and new luxury apartments on the way, there is this - proto. its owners call it an invention factory. it's sort of an interactive museum. so, as we cycle, the little cyclists on the track go round, so it's a race now. yes! it's a competition, yes! so, tell me more about this incredible building — i assume it hasn't always hosted parlour games. exactly. this building, it was the foundry... wow. ..of the shipyard. next to it was the coopersmith, then there were some storages, local power plant, the engine generator workshop and assembly workshop, so huge area where submarines were produced, yes. among all of the family attractions, there are still glimpses of the building's former life. this is a control panel to open the gate, which is here. 0h, here we go! here, these are — exactly, these giant gates. that is a giant gate. yes. that was used to take the ships out of the foundry. 0h, right, so they'd bring them in and out here? yep. you'd press the button and they'd rumble on out