After looking through the DB on my Ascent server I found some objects that can be used to help make custom areas.
To spawn the object type .go spawn <id>
To delete the object type .go select and .go delete
Human House = 4000055
Chapel = 4000066
Lumber Mill = 4000054
Giant Tank = 4000009
Zeppelin = 4000008
Human Boat = 4000003
Table = 181075
Fence = 180035
Night Elf Ship = 4000010
Keep in mind that these are solid objects that you can go inside.