The water supplying system was hewn in the Middle Canaanite period and includes a shaft and a sloping tunnel that descends to a depth of 40 m below the surface - to the groundwater level. The tunnel allowed the city access to water sources even during a siege. Today, there is no water at the end of the tunnel. The descent takes place on a narrow, steep staircase (with a railing, but does not allow two people to pass at the same time). One of the best-known artifacts dug up in this area is the Gezer calendar. This is a plaque with a text, which seems to be a schoolboy's memory exercises or some descriptions for the collection of taxes. Some researchers even suppose that the text was a folk song, listing the months of the year. The tablet with an ancient inscription, dated back to 10th century BCE, is now in the Museum of Archaeology in Istanbul. It lets us know about the agricultural seasons and the ancient Middle East calendar.