Havana was a city located on the island of Cuba on Earth, and was the capital of that island nation-state.
Havana was not affected when the Xindi planetkiller prototype attacked Earth in early 2153. (ENT - Rise of the Federation novel: Tower of Babel)
The family of USS da Vinci transporter operator Diego Feliciano lived in Havana in the 24th century. (SCE eBook: Wildfire, Book 1)
The USS Havana was named for the city. (TNG episode: "Lessons")