The story of a medieval pilgrimage to Islam's holiest sites is saved from cheesiness by some spectacular Imax photography, says Peter BradshawBasically a 45-minute educational piece, blown up to epic size for an Imax screen, and suitable for school outings. In a slightly earnest, pedagogic way, it tells the story of Ibn Buttutah, the young Muslim from Tangier who in 1325 made the traditional pilgrimage to Mecca, a spiritual journey that became a 30-year trek in search of knowledge, taking him all over the world.