Severn Bore

British surf break created by an incoming tidal surge funnelingĀ up the lengthy (220 miles) and picturesque River Severn, about 100 miles west of London. "Ducking under branches and riding through bushes," British champion surfer Rod Sumpter said of his first experience on the Bore in 1968, "rode under the railway bridge where a row of spectators were watching this crazy surfer take on the world's most unusual wave."

The Severn Estuary, which empties into the Bristol Channel, has the third la...