Brichs did you even create new boards???
A "secret laboratory" is good idea for new building...
I would be greatful for any expansions, but really like the idea of a train station. I have always considered them a little creepy to begin with, then add to the fact that it is a perfect link to expansions or the end point of a get away scenario. The trains could have zombies bust out of the railway cars, and present potential weapons (railway spikes, shovels, etc). The railway station could be part of the L piece, and the train could be the other.