The Swellies or Swillies (Welsh: Pwll Ceris) is an area of treacherous water in the Menai Strait, Wales, most commonly referring to the stretch between the Britannia Bridge and the Menai Bridge. == Description == It is notable for its difficulty in safely navigating its shoals and rocks due to the whirlpools and surges that are the result of the tides washing around the island of Anglesey at different speeds.
The Swellies or Swillies (Welsh: Pwll Ceris) is an area of treacherous water in the Menai Strait, Wales, most commonly referring to the stretch between the Britannia Bridge and the Menai Bridge. == Description == It is notable for its difficulty in safely navigating its shoals and rocks due to the whirlpools and surges that are the result of the tides washing around the island of Anglesey at different speeds.
Source: Wikipedia "Swellies" · CC BY-SA 4.0
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