Leeds.
Well, the place I'm staying at here in Leeds might be a student house (and therefore, by implication, something of a dump), but once my housemates have gone to bed, boy is it quiet. So quiet, in fact, that I can hear the blood circulating in my ears - an experience which I can last remember having during a trip to Greece in the 1980s - late in the afternoon, just before dusk, we visited a hilltop temple to Zeus on the Western Peloponnesian, some time after the last tourist group had left. Whether out of a sense of the sanctity of the location, or for other reasons, no birds were present anywhere in the surrounds, and I could hear my friends breathing quietly from metres away.