One benefit of the heatwave sweeping Wales is that it is bringing history to life.
The unprecedented spell of hot, dry weather across Wales has provided perfect conditions for archaeological aerial photography. As the drought has persisted across Wales, scores of long-buried archaeological sites have been revealed once again
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— CBHC / RCAHMW (@RCAHMWales) July 6, 2018
Because fields are dry from the heat, the outlines of ancient settlements buried underneath farmland are now visible from the air. The Royal Commission on the Ancient and Historical Monuments of Wales is snapping photos of the crop marks, which will disappear as soon as it rains.
There are ancient settlements across Wales, and most had drainage ditches around them, BBC News reports. When the settlements disappeared, the ditches were filled in, and now that it's farming land, the soil is deeper where the ditches once were. When it's hot and the land dries out, the old fortifications retain moisture, and the crops there are lush, making them stand out. The Royal Commission on the Ancient and Historical Monuments of Wales has recently taken photos of a medieval castle mound, buried ramparts, and a prehistoric farm. Catherine Garcia