According to a tale, Maritsa, Arda and Tundzha were three sisters who constantly quarrelled who of them was more beautiful. Finally their parents were fed up with the incessant quarrelling and cursed the girls. Consequently, the trio was turned into three rivers. But this didn't stop the three of them to compete. One day, while they were by Adrianople, they decided to race towards the Aegean Sea. The Tundzha, the youngest, cheated. She woke up before her sisters and ran off to sea. When the Arda saw what had happened, she woke Maritsa and both of them rushed after their sister, but not before the Maritsa cursed the Tundzha to have meandering course passing through deep forests and high mountains. They eventually caught up with their sister. The three rivers merged and went together to the Aegean. Ironically, the river they formed bears the name of sleepy Maritsa.