Every year during the first days of July, Copenhagen looks like a ghost city. Locals pack their festival gear and head towards Roskilde festival for 8 days filled with music, partying and events. Hosting musicians from all around the world since 1971, Roskilde festival has now established its reputation and is considered the greatest culture and music festival in Northern Europe. More than 180 bands take the stage from morning to night, entertaining a crowd of more than 100,000 people. If the ticket seems a little pricey, volunteering is always an option. Being a non-profit organization Roskilde is run by approximately 30,000 volunteers.