there is only 1 working Tiger 131 tank that is operable still existing, and a movie "Fury" (not released yet, with Brad Pitt) got it on loan

photo from http://www.dailymail.co.uk/news/article-2123736/Back-70-years-mighty-Tiger-tank-Only-surviving-example-works-restored-wartime-specification.html

it was captured by the smallest margin of luck, a shell from a British Churchill tank damaged the turret just enough to keep if from turning, making the tank useless... and so it was captured, from the African campaign of WW2, and sent to England so any weaknesses could be found and exploited by the Allies.

It was named Tiger by Ferdinand Porsche, and was exceptionally deadly, one Tiger took out a record 22 opposition tanks in one battle in Russia, and one tank commander had a total of 168 enemy tanks destroyed

It's home is the Bovington tank museum in Dorset England.

The movie can be learned about on IMDB http://www.imdb.com/title/tt2713180/?ref_=nm_flmg_act_1

Arnold is having fun with a Patton tank

Russian tank graveyard found by a young guy with a camera

once a tank repair facility, then it became redundant and the tanks became obsolete, and the broken tanks were never moved

Story at http://www.express.co.uk/news/world/462850/Amazing-pictures-of-hidden-Soviet-tank-graveyard-in-Ukraine-taken-by-plucky-teenager

Tanks that could run on "synthetic" fuel because oil and gas was in short supply in Germany during WW2

Hitler's capability to conquer Europe was discounted by the experts of the day at least partly because Germany had virtually no oil deposits. It was thought that merely cutting his oil imports would starve any serious war effort. Those experts either didn't know of, or discounted the potential of turning Germany's vast coal reserves into liquid fuel, the synthetic fuel that powered Germany's motorized Army, panzer divisions, and the Luftwaffe.

In the 1920s two German scientists named Frans Fischer and Hans Tropsch developed a process (the Fischer-Tropsch Method) of processing coal to produce a liquid hydrocarbon fuel by reacting the carbon monoxide, carbon dioxide, and methane obtained from coal. The product was refined to create a synthetic fuel.

In WWII, it was not unusual for German tanks to drive or be towed to the battlefield powered by flammable gas made from wood. At the battlefield the tanks would be converted to burn synthetic fuel in battle. The tide of war turned against Germany when the synthetic fuel plants were bombed and fuel production stopped. In 1944 General George Patton was speeding across Germany with the objective of being the first Allied force to reach Berlin. His forces outpaced his supply lines and his progress stopped. Patton ordered that synthetic fuel be drained from captured or abandoned German vehicles, and some of Patton's Sherman tanks and personnel carries were converted to run on synthetic fuel.

Found on http://patentpending.blogs.com/patent_pending_blog/automobile/page/3/

with a crusher crawler, you will have no problem running over zombies

an Army Corps or Engineers vehicle for getting through swampy tree areas between the Atlantic and the Gulf of Texas, across Florida to make a barge canal (Like the successful Ohio canal) http://en.wikipedia.org/wiki/Cross_Florida_Barge_Canal though the impassible swampy areas where they wanted to make roads in Alabama, Loiusianna, Missouri, etc. it didn't get stuck, because there was no belly pan, it's all track. Powered by a pair of 270 hp Caterpillar engines

Found on http://strangernn.livejournal.com/799388.html#cutid1 which has more info and photos

another concept prototype military r&d tank... the Air Plenum Drive amphib (even floated on water)

Found on http://strangernn.livejournal.com/823333.html