Startup Idea : Crowdsourced audio guides for tourists

A platform/service where anyone can create audio guides - relatively short audio files on different cities and places in them. They could be thematic, e.g. poetic, funny, informative, historic etc. Users can download them and use while travelling or listen directly from the web depending on mobile internet prices and users. People wouldn't have to pay for those boring standard audio guides that are available in most touristic places anymore.