Partly due to its widely publicized "Largest Underwater Wedding Ceremony" which earns it an entry in the Guinness Book of Records, Koh Kradan is now one of the best known islands. The innovative 'weddings underwater' first launched in 1997, is now an annual Valentine's Day event which attracts more people every year, who sign marine marital commitments in Scuba gear at a depth of 12 metres.