The C25 passes through one World Heritage Site – the great institutions of Maritime Greenwich. This includes the Old Royal Naval College, and the stupendous painted ceiling of the Banqueting Hall is undergoing restoration, so until September 2018, up close and personal, you can be treated to an hour’s guided tour. Having drunk in the big picture from the panoramic viewpoint of Jubilee Gardens on the north bank, take the foot tunnel and exchange the telescope for the microscope, as it were. This opportunity will not recur for at least a century!