One thing that has made walking the extra kms easier has been podcasts. I've been a little late in coming to podcasts but now that I have they're great for walking.
One of my favourites is the The Monocle Weekly which is the companion to Monocle magazine. Both the Weekly audio bulletin and the magazine focus on global affairs, business, culture and design in an accessible and smart way.
Hosted by the editor Tyler Brulee (of Wallpaper* fame) with a cast of other international media folks it is a great way of keeping in touch with the world. I tend to only buy the magazine when I'm on holiday so this is an easier way to get the great content on a weekly basis. The content is a mix of in depth stories from the magazines and interviews regarding current world events. Even though they can sometimes approach some dry subjects (aviation shows for example) it is always accessible and interesting.
They also do a winter and summer series that features groovy music from around the world. Listening to The Monocle Weekly podcast whilst walking the 'burbs lets me feel like I'm still part of the world at large.