Santa Eulalia del Rio is the municipality situated at the north-east of Ibiza and occupies an extension of 153 square kilometres. During the Muslim occupation it was known as Xarc. But the territory changed after the Aragonese conquest and the island was divided in quarters, which left the island with a similar distribution we find still today. This municipality was known as the “Quartó del Rei” (the king’s area) as it was acquired by King Jaume I, whom obtained the rights of Infante Pedro of Portugal. The current name of Santa Eulalia was given by the church which was built not long after the conquest.
In this municipality you can find the only river within the Balearics, which was important in the past for the watering of the plants and vegetables, and to help the windmills. Nowadays there isn’t much water flowing.