Hi Lucy, and welcome to WriteWords.
One of the things I rmember about Brokeback Mountain were the long lingering and panning shots of the characters moving through the scenery; the two men jumping in the river; herding sheep in the snow; the outside image at the end, filmed through the caravan window.
There are various novels based around long journeys along a road - basically anything with 'road' in the title.
Memoirs and travel books are a good source of descriptions of scenery, along with the people, places and animals within it.
All the best with the writing.
- NaomiM
<Added>There are several novelists who have based novels in the flat fenlands...Louise Doughty is one that springs to mind.