In which country does the rock festival Ruisrock take place?

Explanation

Ruisrock is an annual rock festival in Finland. The festival has taken place on the island of Ruissalo in Turku since 1970, and is the second oldest rock festival in Europe. Around 70 000 music lovers from across the world visit Ruisrock. This is somewhat lower than the record 100 000 visitors received in 1971. The program predominantly features rock music bands.