It's not common to run across a boutique heavy music festival, but then again, nothing about the two decade old Roadburn Festival is run-of-the-mill. Held in the Dutch city of Tilburg, Roadburn's genre boundary pushing lineup ask festies to redefine their definition of heavy. Taking place in the early spring, 4000 attendees a day come to bang heads, with three quarters of the crowd from outside the Netherlands. More Info below.