Check this out, ppls. This is the Panzer VIII Maus, a Nazi secret weapon that never made it beyond the prototype stage. It was and is the largest tank ever made, weighing in at an incredible 188 tons! Fortunately, it was too heavy and had too many problems and was never really finished. The only surviving example, cobbled together from parts salvaged from the two prototypes, one of which was deliberately blown up by the fleeing Germans, can be found on display at the Kubinka museum outside of Moscow.
http://greyfalcon.us/pictures/MAUS.jpg