After seizing power, Castro made sure his people, who saw him as a paragon of communist equality, did not know about the island, where he would spend weekends relaxing at a beach house with views over the Caribbean.
Its existence has been revealed by a former bodyguard who has written a book exposing the double standards of Castro.
Juan Reinaldo Sanchez was by the dictator's side for 17 years before becoming disillusioned with his hypocrisy and trying to flee to the US.
In his book
The Double Life of Fidel Castro Sanchez
tells how Castro came across the island hideaway shortly after the failed Bay of Pigs invasion in 1961 when CIA-trained exiles tried to overthrow the Cuban Government.
Castro, who stood down as Cuban leader in 2008 and handed power to his brother Raul, kept secret his wealth, which ran into the "hundreds of millions", as well as up to 20 other properties dotted around Cuba, said Sanchez, whose book was serialised in the
New York Post
.
- Daily Mail