National Diving and Activity Centre
The National Diving and Activity Centre is a large flooded quarry at Tidenham, Gloucestershire, England, near to the border with Wales at Chepstow. It was formerly Dayhouse Quarry, a source of limestone, which was flooded in 1996. The diving centre opened in 2003.
An inland scuba diving site, it is popular with technical and free divers due to the depths of up to 80 metres (260 ft), with underwater attractions in depths ranging from 6 metres (20 ft) to 76 metres (249 ft).