One of the most historically interesting regions of Poland, the entrance to which, until 1996, was guarded by two gates manned by the army. We will visit the mysterious, world's largest, fixed artillery battery, which was able to throw 1 ton of shells at a distance of almost 50 km. We will see how quickly such a powerful cannon could fire and how much effort it took to target it. We will also visit closely guarded military warehouses and ride a train carrying powerful missiles. All of this is kept in strict confidence.