From the Portfolio news article:
Walking can not only be a gentle but effective form of exercise for all ages, but offers a rare opportunity to shut off, log out and connect with nature. For a full digital detox, ditch the GPS altogether and embark on a guided tour at one of the many walking festivals around the UK, allowing you to admire the breathtaking landscapes without worrying about directions or right of way.
Read more at the link:
http://www.theweek.co.uk/91122/best-foot-forward-walking-festivals