When I came across Jade Conroy’s article ‘the secret alternative to Santorini’ (published in the Telegraph on 22nd February), Folegandros immediately sprang to my mind. I was right. One of the least known Greek islands, Folegandros is only an hour away (on the ferry) from the world-famous Santorini. This rather small Cycladic island is located in the southern Aegean Sea, nested between Milos and Kimolos on the west, and Sikinos and Ios on the east (Santorini is further on the east).     An off-the-beaten-track island, Folegandros has a small population of fewer than 1000 inhabitants. Every summer, however, it comes to life thanks to a wave of mostly Greek,…