Craig Goch Dam in the Elan Valley of Wales Apr 19, 2018

The masonry dam is the highest upstream of four dams in the Elan Valley region. It turns the Elan River into the Craig Goch Reservoir. With its curved retaining wall and series of arches, the Craig Goch Dam is widely considered the most elegant of the Elan Valley Reservoirs.

© Stephen Taylor/Alamy

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