Check out this awesome AT-AT cross-section infographic! It is from one of the many awesome Star Wars cross-section books:

The AT-AT armored transport walkers were first introduced to Star Wars fans in the flick Star Wars: The Empire Strikes Back. These Imperial war machines gave the rebels a run for their money as it was almost impossible to penetrate these giant’s armor. This infographic shows the inner-workings of the AT-AT and really highlights the vision George Lucas had for his galaxy.

Click the image for full view:

(via: Geek Girls)