It was here at the Jordan River (which flows south from the Sea of Galilee to the Dead Sea) that John the Baptist baptized his cousin, Jesus of Nazareth, earmarking the advent of Jesus' public ministry. Although it's not known exactly where Jesus was baptized, this is a spot that is designated as where the event may have taken place.
Luke 3:21-22
One day when the crowds were being baptized, Jesus himself was baptized. As he was praying, the heavens opened, and the Holy Spirit, in bodily form, descended on him like a dove. And a voice from heaven said, "You are my dearly loved Son, and you bring me great joy." (NLT)