The public art trail of 1988 Brisbane World Expo still exists to this day – sculptures dot the streets of the Australian city, playfully leading people to the site of the fair. Expo 2020 Dubai is the next in line with 11 permanent public artworks leaving a memorable and interactive trail for visitors to discover. Strolling into this open-air art museum, you will find your perception challenged in intriguing ways. There is a piece of fabric frozen in the air, a shadow mural of a bicycle without the bicycle and a marble sculpture creased and tied. The public art programme largely derives from 11th-century Arab mathematician, astronomer and physicist Ibn al Haytham’s ‘Book of Optics’.