The Valley of Elah is the place spoken about in the Bible, found in the 17th chapter of the first book of Samuel, where David fought with Goliath.
The Philistines and the Israelites were gathering for battle. The Philistines encamped between Sochoh and Azekah while the Israelites encamped in the Valley of Elah. Goliath, a tall and notable champion from the Philistine camp, went out to defy the Israelite armies asking for a man to fight. Upon hearing his words, the Israelites became dismayed and were greatly afraid.
This continued for forty days until David, a youth, came to the camp bringing supplies. When he saw Goliath and heard his words, David decided to go and fight with him. David was certain that God will deliver him from the hand of Goliath. He took his sling in his hand and chose five smooth stones from the brook. When Goliath drew near, David ran toward him and struck him in his forehead with the sling and the stone. Goliath fell. David then stood over him and cut off his head with his own sword. Seeing that their champion was now dead, the Philistines fled. The Israelites pursued the Philistines as far as the entrance of the valley.
The Valley of Elah is approximately 45 minutes' drive southeast from Tel Aviv along Route 1 and then Route 38.