The Imagine Peace Tower on tiny Videy Island in Reykjavik harbor doesn’t seem all that impressive most of the time, but on a few nights each year it’s illuminated and it’s magical. Tonight, the memorial built for John Lennon by Yoko Ono, will be lit from 8 PM to Midnight ( 4PM to 8PM New York time and 7PM to 11PM London time) to celebrate what would have been Lennon’s 75th birthday. You can see the ceremony on the Imagine Peace Tower webcam tonight and on other nights that the monument is illuminated.