What's the attraction?For many people, world music is only as old as Paul Simon's 1986 album, Graceland, but it has always been out there. "World music" is a hotly disputed term, of course, but at its best it's music rooted deeply in ethnic or local culture. Far from being a niche sub-genre for sandal-and-sock wearers, it encompasses all manner of rocking, rolling fusions. While it's relatively easy to travel independently to some countries and to major music festivals around the globe, joining a guided tour means you can go to small provincial festivals, forget the logistics and focus on the music. And, if you can't time your trip to coincide with a festival, you can always hop down to Lisbon for a fado-themed weekend, to Santiago in Cuba to get an insight on the son-music scene beyond Buena Vista ,or InterRail your way around the Gypsy music scenes in the Balkans.