Well, here's something my clan and I have been working on, it's not perfect, but it's showing us a lot what is possible with terraforming even in the most basic stages.

The roof, floor and stairs are made out of logs, walls and walkway are terra (earth, dirt).

http://www.youtube.com/watch?v=OBfafREKIIU

No music, because it's rather short, but yep, hope you enjoy/gives some ideas.

Comments, criticism, old food, all is welcome!

We intend to continue on and make this a larger complex, but this is just the first stage and wanted video of it incase terrain gets wiped, lol.

EDIT: Just realized, though you can barely see it - I have the awesome baseball bat I scavenged on my back! haha.