I’ve been writing about Hezekiah’s Tunnel for 35 years. (I can be seen with a long beard standing in my undershorts up to my hips in water in the picture of Hezekiah’s Tunnel in the standard archaeological encyclopedia of the Holy Land;¹ the photo was taken in 1972.) A trip through the tunnel—from the first foot into the water, bending down to navigate a less-than-5-foot ceiling, finding the place where the two crews of tunnelers met, exploring the “false” tunnels, examining the place where the famous Siloam Inscription was carved, looking up at the ceiling nearly 17 feet above the floor, to coming out into the old Siloam Pool—can be one of most exciting adventures on a trip to Jerusalem. And with every scientific effort to understand this extraordinary tunnel, it becomes a more remarkable achievement.