Treehouse Map Thingy

So yeah I'm planning to create a map based on the Treehouse for Garry's Mod. I'll try to use entities and texture from Half-Life 2 only since not everyone of us own CS:S.

But I need help on how it could look like. Planning the positions of buildings and rooms. The form of the tree and stuff. I'll draw a rough summary of it soon but some ideas wouldn't hurt.

a laboratory that has a secret passage to an even more secret laboratory that has a death pit filled with evil penguins

also the lab would have odd body parts of futons and clowns

YES

There should probably be rooms to represent different sections of the forum.

example: a tavern or bar for Games and Silliness.

Good idea. Haven't though of that one.

I learned some elements of architectural appearance in a class last year that may help as well.

Vertical Lines: Dignity or Spirituality

Horizontal Lines: Relaxation

Diagonal Lines: Movement

Curved Lines: Freedom (although can very depending sharpness of curve)

Also a ninja dojo that is just a cover for a secret underground base...for ninjas...and starships...and ninjas...ninja starships... []

Somewhere in the roots(if tree) there should be my little lab/slaughterhouse thing.