See all Attractions in Swansea Swansea for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping Oystermouth Castle About Oystermouth Castle (Welsh: Castell Ystum Llwynarth) is a Norman stone castle in Wales, overlooking Swansea Bay on the east side of the Gower Peninsula near the village of the Mumbles. Add to Wish List
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