… is an artwork by Yoko Ono. On her website it says that the “IMAGINE PEACE TOWER is a Tower of Light which emanates wisdom, healing and joy. It communicates awareness to the whole world that peace & love is what connects all lives on Earth.” (See here for more.)
Yoko Ono dedicated the tower to John Lennon, who had asked her once, if she could build the light house, which she was talking about in one of her conceptual artworks. In 2006 she did. The tower is situated on Viðey Island in Reykjavík, Iceland.
Here Yoko Ono talks more about the tower: