The Seven Underwater Wonders of the World was a list drawn up by CEDAM International, an American-based non-profit group for divers, dedicated to ocean preservation and research.
In 1989 CEDAM brought together a panel of marine scientists, including Dr. Eugenie Clark, to pick underwater areas which they considered to be worthy of protection.
Palau
The Belize Barrier Reef
The Galapagos Islands
The Northern Red Sea
Lake Baikal
The Great Barrier Reef
The Deep Sea Vents