24 metric tonnes of abstract act in honour of the famous Finnish composer, the monument was designed by Eila Hiltunen and sparked a lot of controversy when it was unveiled in 1967. The Helsinki public was a little bemused by the concept of abstract art those days.
A tourist must, and worth seeing just to go stick your head into one of the 600 odd vertical metal pipes. Make some of your own music into them while you’re there and scare off the more self-respecting tourists. You know you want to.
An addition of the sculpted image of Jean Sibelius himself was added to the design to keep the non-artsy plebs happy.