A mosque in Sudan, near the Nile River, if I'm not mistaken. 

Some of the riders loved the sound of the faithful being called to prayer.  Given that this usually occurred at 4:00 AM over cheap loudspeakers that made the sound scratchier than a wool coat filled with Brillo pads, I did not.  I personally feel that the only pleasant sound one can hear at 4:00 AM is that of Sophie Marceau turning over.