Tuska Open Air Metal Festival, shortly Tuska (Finnish: pain, agony), is the largest music festival dedicated only to metal and related styles of music in the Nordic countries. It takes place in Kaisaniemi park in the middle of Helsinki, Finland. The festival usually takes place in the last weekend of June. The history of Tuska began in 1998 and it has grown larger every year. In 2006, the festival was almost sold out and over 33,000 in attendance arrived to watch 32 artists, including for example Anathema, Celtic Frost, Opeth, Sodom, Venom, and Finland's own Amorphis and Sonata Arctica.