Finland's entertainment culture produces outsized results for a country of 5.5 million. The Helsinki Festival — the largest in the Nordic countries — stages music, theatre, dance, and visual events across two weeks in August. The Savonlinna Opera Festival, held in a medieval lakeland castle from July to August, is one of Europe's most atmospheric opera settings and an internationally regarded production showcase. The Pori Jazz Festival is one of Scandinavia's oldest and most respected jazz events. Finland's extreme metal music scene — producing internationally significant bands across the black metal, doom metal, and symphonic metal genres — has made Helsinki a destination for a specific and serious international music audience. The Kaustinen Folk Music Festival and the midsummer bonfire tradition extend the entertainment calendar into folk and seasonal celebration.