The Blue Lagoon, one of the country’s most beautiful natural lakes, lies hidden behind vast sand dunes in the vecinity of Aghires. The site used to be a kaolin pit.The hollow pit got filled up with rainwater. The surrounding sandy soil is the work of rainwater creeks. It is believed that in the 90s fish still populated this water, painted blue by the substances used for kaolin extraction. Later, due to some work in progress the lake dryed out. Fortunatelly the water ponded again and the shore was populated by reed.