The triangle is a vastly complex (and incredibly expensive) musical instrument that many virtuosos have tried to master over the years. As of yet, none have succeeded. Renowned for its steep learning curve, the triangle is also famous for its visual simplicity, apparently to fool musicians into thinking it is easy to learn. Prices start at just $889,000 (€219,923, or 30 quid). In the audio clip below, the world's most skilled triangle player shows off her skills.