On what would have been John Lennon's 67th birthday, she unveiled a project 40 years in the making—the Imagine Peace Tower. Dedicated to Lennon, the tower shoots light into the sky and bears the inscription “Imagine Peace.” It will light up every year between October 9th, the day of Lennon’s birth, and December 8th, the day of his death.
Yoko chose a small island just off the coast of Reykjavik, Iceland for the memorial because of its beauty and its reliance on natural power. The tower will be powered entirely by geothermal energy, which is plentiful on the volcanic island.
She has a website called Imagine Peace which has a 10 minute video of clips of John and Yoko talking about their work for peace, followed by some stark images of war to the tune of "War is Over". It'll make you cry. Some of it is too ugly for kids. There's also a letter from Yoko about the various celebrations that happened this year in remembrance of John.
War is over if you want it.