The Jordan River
http://en.wikipedia.org/wiki/Jordan_River

http://www.vatican.va/holy_father/john_paul_ii/travels/documents/hf_jp-ii_spe_20000321_wadi-al-kharrar_en.html

In Biblical history the Jordan appears as the scene of several miracles, the first taking place when the Jordan, near Jericho, was crossed by the Israelites under Joshua (Josh. iii. 15-17). Later the two tribes and the half tribe that settled east of the Jordan built a large altar on its banks as "a witness" between them and the other tribes (Josh. xxii. 10, 26 et seq.). The Jordan was said to be crossed dry-shod by Elijah and Elisha (II Kings 2: 8, 14). Elisha performed two other miracles at the Jordan: he healed Naaman by having him bathe in its waters, and he made the ax of one of the children of the prophets float, by throwing a piece of wood into the water (II Kings 5:14, 6:6).

Christian tradition also holds that John the Baptist baptized Jesus in the Jordan.

Jesus, I baptize you (pdf)