Join一 健康与福祉 upcoming events being held in Santa Eulària des Riu. Santa Eulària des Riu is a charming coastal city located on the eastern coast of Ibiza, Spain, known for its beautiful beaches, crystal-clear waters, and a rich cultural heritage that includes Phoenician and Iberian ruins, as well as a picturesque old town with narrow streets, whitewashed houses, and a stunning 16th-century church.