Time Out says
There are almost no international bands visiting Zagreb throughout August, but this nearby music festival will cure the cravings of music crazed consumers. Taking place in Hum na Sutli, about an hour's drive north of Zagreb, next to the Slovenian border, this two-day festival costs less than 100 kunas but features very exciting names from the region's music scene. Ex Haustor frontman Darko Rundek visits with his Ekipa ensemble, playing songs from his nearly 40-year career. Other highlights include cult Rijeka singer Damir Urban and band, plus Belgrade psych-garage trio Dogs In Kavala. Don't miss Osijek’s Harvo Jay; they're one of Croatia's best alternative rock bands of the moment. The festival cooperates with nearby spa Terme Tuhelj and offers a free bus service between the festival site and pools. There's free camping and a bus service from Zagreb found on their Facebook page.