The Cave of Tzidkiyahu
As the Babylonian armies carried out the destruction of Jerusalem, the last king of Judah,
Tzidkiyahu, fled through a secret tunnel that ran from his palace to the plains of Jericho. But Heaven had marked him for destruction as well, and a deer was sent to run on top of the tunnel. The enemy soldiers pursued the deer and caught up with it at the other end of the tunnel just as Tzidkiyahu and his sons were exiting. They slaughtered the king's sons before his eyes and then blinded him and carried him off in chains to imprisonment in Babylon.
It is told that it was from this tunnel that stones were quarried for the building of the Beit Hamikdash.