Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
British heavy tanks of World War I
A number of tanks survive, although several are just shells that have had all internal components removed. The largest collection is at The Tank Museum at Bovington in the United Kingdom, which holds eight tanks. Two of these are maintained in running condition, the Mark IV Male, "Excellent" and Mark V Male number "9199". "Excellent" last ran in the 1980s and "9199" in the 2000s. The Bovington museum does not intend to run them again, due to the wear and tear that would be inflicted on the now-fragile, historic vehicles. Instead, the museum acquired a replica Mark IV tank (constructed for the film "War Horse"), which is used for public demonstrations.