Estonia

MALAYSIA has one of the most unique monarchy systems in the world, with 9 kings. Malaysia's unique rotational monarchy among nine hereditary state rulers, the new king,will hold office for five years.

Written by Icelandic composer Jón Leifs in 1964, the piece called Hekla, Op 52, requires four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons and metal chains to play.