I wasn't familiar with the Finnish "cello rock" band Apocalyptica until an anonymous reader sent me the link to one of their video clips today.
According to Wikipedia:
The band is composed of classically trained cellists Eicca Toppinen, Paavo Lötjönen, and Perttu Kivilaakso (all three of whom are graduates of the Sibelius Academy in Helsinki) and drummer Mikko Sirén. Originally a Metallica tribute band, their music borrows elements from many genres including classical music, neo-classical metal, post-grunge, progressive metal, thrash metal, and symphonic metal. They have sold over four million albums to date.
There's more at the link.
Here's the video clip to which I was directed. Apocalyptica perform an instrumental version of the Metallica hit "Nothing Else Matters".
I don't like a lot of "fringe" rock, but even I have to admit . . . that's beautiful!