Are you in Prague on August 23rd? Do you own a camera? Then you can go to Prague Photowalk. Well, you should register on the official page first: http://www.photoshopuser.com/photowalk/city/prague.html (as for now there are 6 photographers registered)
Are you anywhere else in the world on August 23rd? You can go to your "official" photowalk, too. See all information here: http://www.photoshopuser.com/photowalk/
If you're going to attend these, let me know :) I would love to see your photos.
PS: Today's photo was taken in front of Podoli swimming pool (quite randomly), very loosely based on the photo from inside Podoli swimming pool :)