A huge collection of Mp3 sound files from all over the world, the sounds have been tagged by country and described and a visitor to the site can take a sound journey around the world. 

Find out more at http://soundtransit.nl/index.html. 

For possible uses within education see Nik Peachey's blog at http://nikpeachey.blogspot.com/2008/03/soundscapes-from-soundtransit.html.