i go for an hour walk every evening, i listen to a podcast, because it's talking i can still here nature sounds
i check out the woods behind my house a few times a year
some interesting walking chatter can be found here
http://radioghost.com/, the "walking with sean" podcasts are interesting, although when i mentioned to the podcaster how much i enjoyed it he responded thusly
@Sherwinsleeves @djjd1962 my sense is that its verging on being the most supremely dull thing ever recorded