Mad Cool Festival, yet another jewel in the crown of Madrid, the festival capital of Spain. Ever since its first edition in 2016, this three-day festival is attended by people from all around Europe. Artists whose names never seem to leave the international music charts, perform here, making Mad Cool one of the most important festivals of Spain. Neil Young, Kings of Leon and Green Day are just few of the names who have rocked one of the many stages of Mad Cool.