Panzer VIII Maus

The mouse, or Maus, wasn't at all small. The largest fully enclosed armored fighting vehicle ever constructed, it was. If the Maus had ever been used, it would have been a terrifying sight on the battlefield, measuring 33 feet (10.2 meters) in length and 207 tons in weight. Only two of the five that were ordered were ever built.

The 128mm gun was put through tests in late 1944, and it was discovered to be capable of destroying every armored vehicle used by the Allies, with some tests succeeding at 3,500 meters (11,500 feet).

This Wunderwaffe, on the other hand, had significant flaws. Building an engine powerful enough but small enough to fit in the vehicle was difficult, and the fastest speed ever achieved during testing was 14 miles per hour (22 kph). In addition to its slow speed, the vehicle's weight made crossing most bridges impossible. As such, the tank was designed to be driven through rivers using a snorkel and was allegedly capable of submerging 26 feet (8 meters).

Before the Maus could be used in battle, the war came to an end. The prototypes were taken by the Russians, who then tested them there. The second tank's turret was attached to the hull of the first tank. The last surviving car is kept at the Kubinka Tank Museum outside of Moscow.