Often, hinterlands. the remote or less developed parts of a country; back country

The hinterlands are usually much more picturesque than the urban areas.

the land lying behind a coastal region.

an area or sphere of influence in the unoccupied interior claimed by the state possessing the coast.

an inland area supplying goods, esp. trade goods, to a port.

noun

boondocks * , boonies , borderland , brush , bush country , frontier , outback , sticks , wasteland , wilderness , woods