DescriptionTwyn y Gaer Iron Age Hill Fort, situated atop the Gaer mountain, S. Wales..jpg
English: Twyn y Gaer Iron Age Hill Fort, situated atop the Gaer mountain, in the Black Mountains, between the villages of Patrishow (Powys) and Cwmyoy (Monmounthshire), in S-E Wales. Aerial shot taken along the east-west axis. The various sections of the fort are easily visible, as is the abundance of purple heather. Beyond the hill is the Grwyne Fawr valley.
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