Just watched
'The Wall' on TV, a 2012 sci-fi film about a woman trapped by a force field (the "wall") in a mountain valley..
http://www.imdb.com/title/tt1745686/
********Spoiler********
It was a load of krap, we never saw any aliens or hardly anybody else, she just mooched around for a couple of years growing crops and hunting animals and writing her boring introspective soul-searching diary.
I only stuck with it to the end to see the aliens, but they never showed up and the film ended with her still trapped in there, so we never did find out who plonked the wall down. or why nobody rescued her! It was a German-made German-language film and judging by this effort the krauts have got a long way to go yet before they rival hollywood!