These recordings have then been reimagined, remixed and reworked by a team of around 95 musicians, artists and sound designers.
For instance, there's a three-minute audio clip containing the phrase 'The next station is Covent Garden' in 12 different languages.
The ambient beeps, murmurs, drips and musical hum woven around this everyday announcement has the quality of a film score: listen with your eyes shut and let your imagination provide the drama to accompany the growing cacophony.
The resulting interactive map is a delight: you can waste hours enjoy listening to either the original field recordings, or the reimagined ambient music, full-on house, or banging techno tracks created by the artists in response.
About Cities And Memory
The Next Station is part of a wider, global project by Cities And Memory, which aims to present and remix the sounds of the whole world.
The Global Sound Map has two sounds for every location: a documentary field recording, documenting the current reality of a place, and a reimagining of that sound, providing an alternative counterpoint.
There are currently more than 1,300 sounds featured on the sound map at Cities And Memory, spread over 55 countries.