Terrain Thralls has an illustrated tutorial on making a half-timbered, two story roadhouse. The end result is beautiful, and would be useful in a wide variety of settings.
modeling
Building A Western Gaming Table
The Great Escape Games forums have a very nice photo tutorial on making a western mine gaming table.
Modeling Flagstone Streets
Rob Hawkins’ Hobby Blog has a tutorial on making flagstone streets. The results look amazing.