History
The Seventh Doctor, Ace and Bernice Summerfield accidentally went there in 1915 when trying to visit Ernest Hemingway in nearby Key West, Florida. Once there, they met Francois Lacombe, a native of the Alsace region of France. While there, they prevented Gilles Lemaitre from summoning Cthulhu. (PROSE: White Darkness, PROSE: All-Consuming Fire)
During or before his eighth incarnation, the Doctor witnessed a hoodoo ceremony in Haiti. (AUDIO: The Next Life)
According to the Seventh Doctor, it was a Haitian who first deciphered the Rihanssu language, which allowed a peace treaty to be drawn up, and ended an interstellar war with Earth in the 27th century. (PROSE: The Pit)