Around Ry, there are some small signs at places, where there is a special story to tell. The square black/white pattern on the poles is a "bar code" that you can scan using a mobile phone.
This type codes called Quick Response codes - QR codes.

How do I do?

You have to have a mobile phone that can access the internet, and has a built-in camera in order to get the story (as you have to scan the code using you camera).

You can download the application on one of these websites (it's for free):

www.scanlife.com
www.semacode.com
www.neoreader.com

Once you've installed the application and scanned the code, the phone will automatically read you a little story.