Twin Coves Beach was the setting for a movie filmed in Eleuthera, called "Three". It was filmed in 2005, and starred Billy Kane, and the backside of Kelly Brook. See this link to see a trailer.
Nautical Chart of the Area of Twin Coves
There are many nearby, offshore reefs, good for snorkelling
This Google Satellite Map shows where Twin Cove Beaches are in relation to Club Med Beach; you can more clearly see how they are separated by a point of rocks.
You can see the sand bar, leading to Bluff Cay; also, see the nearby reefs