The Rural Setting Thesaurus by Angela Ackerman & Becca Puglist is another book writer's should have in their reference library.  This one, as the name suggests, covers common rural areas. This one is especially handy for people that mostly spend time in cities and need to describe a country location with more details than you'd get from looking at a picture of barn. 

Like the other books in the series, this book gives you something for all the senses to add that little extra depth to your writing. 

Definitely a must have!