Why is 'Mary Celeste' a mystery?

The fact that nobody knows what happened to the Mary Celeste 10 in 1872 is a reason why Mary Celeste is a mystery. The mystery of the disappearance of the captain with his daughter and wife as well as of all of his crew and officers remains the greatest maritime enigma of all time. No one scenario yet tends to fit even though suggestions of mutiny, piracy, seaquakes and water spouts have been offered.