Solomon was anointed king here; Hezekiah tunneled water into the city
First mentioned in the Bible
"Zadok the priest and Nathan the prophet went down and had Solomon ride on King David's mule and brought him to Gihon. Zadok the priest took the horn of oil from the tent and anointed Solomon."— 1 Kings 1:38-39
Background
The Gihon Spring was ancient Jerusalem's only natural water source. Solomon was anointed king here. Later, when Assyrian king Sennacherib threatened invasion, King Hezekiah carved a 533-meter underground tunnel to channel the spring's water into the Pool of Siloam inside the city, ensuring water supply during a siege.
Related Scriptures (New World Translation)
Then Zaʹdok the priest, Nathan the prophet, Be·naiʹah the son of Je·hoiʹa·da, and the Cherʹe·thites and the Pelʹe·thites went down and had Solʹo·mon ride on the mule of King David, and they brought him to Giʹhon. Zaʹdok the priest now took the horn of oil out of the tent and anointed Solʹo·mon, and they began to blow the horn, and all the people began shouting: “Long live King Solʹo·mon!”— 1 Kings 1:38-39