A visit to the Minack Theatre at Porthcurno is a truly memorable experience. Looking down into the amphitheatre from the entrance, the first impression is of a cascade of terraces tumbling vertiginously into the waters of the Atlantic far below. This downward momentum is abruptly halted by a stage on which the ancient Greeks would have felt quite at home. Beyond lies the ocean, an enticing aquamarine on a calm summer’s day, but prone to being whipped up into a turbulent frenzy by the unpredictable Cornish weather.