Dun Borrafiach is an Iron Age broch located on the Waternish peninsula of Skye. It occupies a rocky outcrop overlooking the Borrafiach Burn. Dun Borrafiach has an external diameter of 16.5 metres, and the walls still stand to a height of 2.7 metres on the south side. The entrance is on the northwest side of the broch. The northeast side of the entrance-way appears to have been narrowed in antiquity by the insertion of additional walling. Inside the broch, a long stretch of the outer face of the intramural gallery is still visible on the east side.
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Built around AD 90 to entertain the legionaries stationed at the fort of Caerleon (Isca), the impressive amphitheatre was the Roman equivalent of today’s multiplex cinema. Wooden benches provided seating for up to 6,000 spectators, who would gather to watch bloodthirsty displays featuring gladiatorial combat and exotic wild animals.
Long after the Romans left, the amphitheatre took on a new life in Arthurian legend. Geoffrey of Monmouth, the somewhat imaginative 12th-century scholar, wrote in his History of the Kings of Britain that Arthur was crowned in Caerleon and that the ruined amphitheatre was actually the remains of King Arthur’s Round Table.
Today it is the most complete Roman amphitheatre in Britain.