Il buco

This is like slow TV in a film. Its pretty much dialogue free - you hear people chatting in the background but no subtitles are given, indeed its assumed that its random idle chit chat being spoken, which has no real impact on the story. The story, as it were, is seemingly about a group of cavers who descend into this (well, you guessed it!) cave in Italy. I thought it was quite atmospheric, with the noises of echoing and dripping water often being heard.