back blocks

from The Century Dictionary.

• A collective name in Australia for those sections which lie back of or away from the settled regions; the back country; the far interior: so called from the fact that on the survey-maps the country is divided into “blocks,” or sections.
• Those parts of a station which are distant from the river-front. See frontage.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun slang Remote countryside.