Hydra, a Greek island in the Saronic Gulf, is a rare luxury in today's world – an island with no cars. It has rocky coves, beautiful sunsets, and is only a 100-minute hydrofoil trip...

I first learnt about philotimo on the rooftop of The Modernist hotel, looking out across the seven hills of Athens and the Saronic Gulf. As I admired the view, the hotel manager asked me...