Megmet's Fotothing

No it's not a photo of the moon, it's daylight seen at the other end of the tunnel leading to the hidden valley!
It's very dark, it runs right through the hillside and is about a km long and a metre and a half wide by two high. This tunnel was originally used as a shortcut by the men constructing the dam at El Chorro, they used it to transport all they needed for the dams construction.