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Things to Do in Shannon

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Poulnabrone Dolmen (Poulnabrone Portal Tomb)
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One of Ireland’s most-photographed ancient sites, the Poulnabrone Dolmen—comprising a long slab of rock placed horizontally on top of several upright slabs—has stood on this lonely limestone plateau for 5,000 years. It marks the site of a mass grave containing the remains of ancient people buried here between 3800 and 3200 BC.

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