This book describes the main sights of the Greek island of Sifnos, in the Cyclades. This is done mainly through a hike from the capital Apollonia to the medieval settlement of Kastro, the island's old capital, one of the best preserved fortified towns of the Aegean Sea. Also, another hike to the island's main pilgrimage, Panaghia Chryssopighi. Two wonderful trails next to chapels of astonishing aesthetic sensitivity and in a nature of incomparable beauty. But also those who don't hike can see all this since these sights are also accessible by car. This book, based mainly on a large number of photos, with concise historical and architectural explanations, endeavours to make this island more known and give a glimpse of it to the visitor who desires to discover it.