Here is a browseable listing of pet friendly self catering cottages in Gwent sleeping 6-7 guests.
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England - Scotland - Wales
Devon - Cornwall - Lake District - Highlands - North Wales - South West Wales
Skenfrith Castle Skenfrith, Gwent, Wales
Caerwent Roman TownRoman Site
Llanthony, St David's ChurchHistoric Church
Caerleon Roman Fortress, Baths, and AmphitheatreRoman Site
Caldicot CastleCastle
National Roman Legion Museum, CaerleonMuseum