Once upon a time, there was a brave Dragon Murin who protected the inhabitants from invaders and robbers. He was the illegitimate son of Hera and Poseidon, and he ruled the polis of Heracles from his court on the island of Velika Smokvica. Murin was very aware of his power, so in order to protect, on the longest day every year the villagers had to give him the fattest sheep and the most beautiful girl for a wife. Not one of the unfortunate girls has survived her first dragon-wedding night.
The villagers kept sending the most beautiful girls to their dead, until one day when the hero of the ancient Greek heroic smithy, called the hero Aristoles, appeared on the winged horse Pegasus, he was the great-grandson of the Argonaut Jason. Aristoles fell in love with the most beautiful girl in the village, a girl who was destined to be the Dragons next wife. Aristoles knew if a Dragon takes his girl, she will die..
Unable to bear the loss of his beloved one, a young hero Aristoles challenged the evil Dragon to a duel. With a spear (forged with the help of Hephaestus and the moon dust by the mighty goddess Athena), Aristoles mortally wounded the Dragon. Dying, Murin dug his own eyes out with his claws. He threw one eye far behind today's Mljet, and the other just slipped under his feet, melted the stone and created a hollow. While the dragon was dying, the sea began to pour into the newly formed hole through cracks in the surrounding stone.
Thanks to Aristoles brave and unselfish love, the village got a lake which the locals symbolically called the Dragon's Eye. According to this legend of the dragon Murin, if two lovers bathe in the Dragon's Eye, they will be faithful to each other for the rest of their lives, and their marriage will be blessed with eternal love and healthy children.
Ps. Yes, of course Aristoles and his beloved one lived happily ever after. :)