The Neighbour to the South
The country that lies about 90 miles south of Florida is Cuba. The two are separated by a stretch of water known as the Straits of Florida. Cuba is the largest island in the Caribbean, and its closest point sits remarkably near the southern tip of the United States.
The Famous 90 Miles
In Key West, the southernmost city of the continental United States, a brightly painted marker proudly announces the distance to Cuba. The figure of 90 miles has become a famous piece of geography, often repeated in news, history, and popular culture. The true distance is actually a little greater - closer to 95 miles - but the rounded 90 has stuck firmly in the public imagination.
Close Neighbours, Long History
This short distance has shaped the relationship between the two countries for generations. The narrow gap has been a route for trade, for migration, and at times a focus of political tension. It has also created deep cultural ties, especially in southern Florida, where a large Cuban-American community has had a lasting influence on the regions food, music, and identity.
Source
This article was written using information from Wikipedia.