LifestyleHigh above the city rooftopsTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoLifestyle08/12/2022August 12, 2022Every summer, the Polish city of Lublin is completely transformed over the course of a weekend when 100 slackliners from 15 nations take to the air, balancing high above onlookers below.https://p.dw.com/p/4FTRqAdvertisement