She fled away from the stream but was chased by Alpheus. Worn out, Arethusa called on the her goddess, Artemis. Artemis turned her into a spring of water. But still, she was not free from Alpheus, changing back into a river, he went into the tunnel that Arethusa went into and now his water is intermingled with the water from Arethusa's fountain. It is said that if you throw something into the Alpheus in Greece, it will turn up into Arethusa's well in Sicily.