Watch on Soap2day. Rawa Blues Festival (pronounc. rava) is one of the largest (world's largest indoor blues festival) and most popular blues festivals in Europe and in the world. The festival was named after the Rawa River, which flows through the city of Katowice in Poland. The first edition was held in April 1981. Narodowa Orkiestra Symfoniczna Polskiego Radia w Katowicach , KEB' MO' , Corey Harris