Big crowds have been lining the banks of the River Severn in Gloucestershire to catch a glimpse of a four-star bore.
The bore attracts surfers who enjoy riding the enormous tidal wave
Some travelled from overseas to witness the famous tidal wave which, according to environment experts, was due to peak on Thursday and Friday.
Chris Evans, one of several surfers who took the chance to ride the bore, said it was a bit crowded on the water.
"But it was bigger than I've seen it before, it was very good. It was quite an experience," he said.
Libby Fairweather, who came with a coachload from Epsom said: "I expected it to be a wall of water but it was still impressive, lovely to see and worth coming".
Her friend, Vera Field, added: "I'm glad we came. We've seen it on the television and always wanted to see the real thing. It's a wonderful atmosphere."
The landlord of the Severn Bore pub, which is a popular vantage point for bore-watchers, opened specially to offer breakfast.
"It was very very busy. People were queuing from 8 o'clock this morning. We've done 150 breakfasts today. It's like Christmas," he said.
An Environment Agency spokesman said another bore of similar size was expected on Friday morning.