The real moon rocks are stored in Warehouse 51. Be careful though, because the illuminati have hidden the entrance really well, and they also have killer robot puppies with laser eyes stationed nearby. Wear acid proof boots, because they urinate sulfuric acid! Also, they have killer cockroaches there: those have been crossbred with piranhas and flying squirrels, so they fly and they bite!
If you go inside, it should be the third hallway on your right, and in that hallway, it's the 72nd door on the left. Don't mix those numbers up! The 72nd hallway on your right and the third doorway to your left lead to a one way portal to Hell.
PS. The coordinates are at 51° 51′ 51″ N 51° 51′ 51″ W. Make sure to bring diving gear! (And remember, sulfuric acid proof!)