WordCamp Europe 2013 in Leiden, the Netherlands
http://en.naoko.cc/2013/10/07/learnings-from-growing-local-wordpress-communities/
http://ja.naoko.cc/2013/10/14/wordcamp-europe-2013-report/
Cover photo credit: BilabialBoxing (http://www.flickr.com/photos/74815194@N00/2578068674/)