At present, visitors can see Yoko Ono’s permanent work Wish Tree Garden, which has involved indigenous trees being planted all around the world; chosen for its importance to the location and climate. On a slip of paper, visitors to the works are invited to hang a ‘wish tag’ on the branches of the trees. The wishes are regularly collected and when the exhibition ends they will be sent to the artist herself, and delivered to Ono’s Imagine Peace Tower on the island of Viðey in Kollafjörður Bay, Iceland