Climb down the stony banks of the massive Sau reservoir in the mountains above Barcelona and you get a real sense of why this famous city is so short of water that it's resorted to bringing in emergency supplies - by ship.
Nestling in a deep valley of stunning cliffs and forests, this vital source of water has sunk so low it's exposed the eerie sight of a medieval village that was flooded when the reservoir was opened in the 1960s.
The huddle of ancient stone buildings, including a church with its spire, has now re-emerged into the light and stands as a potent symbol of the severity of this water crisis.
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