What other cool stuff are you thinking of adding?
We've got a few things to add. Asp is currently working on a little Seaside highway, a bit like in Half-Life 2. We've also got to finish the underground labs, so it's not just a huge dead-end. We've also got to work on the sewer/drainpipe system. I'm currently working on a school, which is where that gym comes from.
We are considering making a beached army destroyer- something fun to explore!
There's a few others, but they're secret ;D