Groundwater levels below the Karnak temple complex situated in the town of Luxor have risen alarmingly. Experts say that this could result in the crumbling or sinking of the complex, which was built around 2,500 years ago. The groundwater that was measured at almost seven metres below the foundations 50 years ago, can now be found less than one metre below the temple. Leakage from drinking water and sewer pipes are among the suspected causes of the problem. Archaeologists say that the only way to save Karnak is by reducing groundwater levels all across the country.