Launched on 20 August 2008, consisting of 17 vibrant hornbeam trees formally planted in a grid pattern, at the heart of this landscape three trees slowly rotate. This project is called “Arbores Laetae” or “Joyful Trees” is the latest project designed by New York architects Diller Scofidio and Renfro. Located in a roadside park in Liverpool, the slowly rotating trees, intended to be a playful reinvention of the public park. I don’t know why some people would spend their time designing something like this …or maybe is just a project that wants to attract more tourists to the city. You can find more info about this project here. – Via

You can see the trees in action in this video attached below, just click play.