![](http://www.alamy.com/thumbs/6/6D836D56-3B34-4ED1-813E-2EF0A380D299/CFRKGF.jpg)
The remains of Iron Age roundhouses in Tre'r Ceiri hill fort in the Yr Eifl Mountains, North Wales
Size: 5616px × 3744px
Photo credit: © Robert Slade / Alamy / Afripics
License: Licensed
Model Released: No
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