“Welcome to Delphi”, says the taxi driver as we enter the small town, “the centre of the world”. The reason for that comment will become clear, but as we look out of the car window at the unbelievable scenery which has been unfolding for miles, we feel more like we’re on the edge of the world than in its centre. The modern town of Delphi lies just a few hundred yards from the ancient civilisation of the same name, perched precipitously on the steep slopes of Mount Parnassus and looking across the spectacularly deep valley of the dry River Pleistos to the Gulf of Corinth. One first stroll around its…