Cuba is the largest island in the Caribbean at about 105,000 km² for the main island — roughly 109,884 km² including its 4,000-plus surrounding cays and the Isla de la Juventud — stretching some 1,250 km from Cape San Antonio in the west to Punta de Maisí in the east while rarely exceeding 200 km in width. That long, narrow shape, sitting across the entrance to the Gulf of Mexico, has determined Cuban history more than any other single fact.
The Key to the Gulf
Spanish administrators called Havana la llave del Nuevo Mundo — the key to the New World — and the phrase was literal. Cuba sits astride the Straits of Florida, roughly 150 km south of Key West, with the Yucatán Channel to its west and the Windward Passage separating it from Hispaniola to the east.
Every ship carrying silver from Mexico and Peru back to Spain had to exit the Gulf of Mexico through waters Cuba overlooks, because the Gulf Stream provided the only practical current-assisted route home. From 1561 the Spanish treasure fleets assembled at Havana before making the Atlantic crossing together, which is why the city acquired fortifications out of all proportion to its size — El Morro, La Punta and, after the British captured Havana in 1762 and held it for eleven months, the vast La Cabaña fortress.
The same position explains twentieth-century events. Cuba's proximity to Florida is what made the 1962 placement of Soviet missiles there so acute a crisis, and it remains the reason the United States retains a naval station at Guantánamo Bay under a 1903 lease. The Havana city guide covers how the fortifications shaped the capital's growth.
Three Mountain Ranges and a Great Deal of Flat Ground
Roughly two-thirds of Cuba is plain or gently rolling country, which is unusual for a large Caribbean island and is the foundation of its agriculture. The uplands fall into three distinct groups, separated by lowlands rather than forming a continuous spine.
- The Sierra Maestra in the south-east is the highest, culminating in Pico Turquino at 1,974 m. It rises steeply from a narrow coastal strip near the Cayman Trench, and its inaccessibility made it the base for Fidel Castro's guerrilla campaign from 1956 to 1958 — and, a century earlier, for independence fighters against Spain.
- The Escambray in the centre, around Trinidad, reaches about 1,140 m at Pico San Juan.
- The Guaniguanico range in the west, including the Sierra de los Órganos, tops out near 700 m but contains Cuba's most distinctive landscape.
That western landscape is the Viñales Valley, a tropical karst of mogotes — steep-sided limestone towers with rounded tops, remnants of a limestone plateau dissolved away over millions of years, leaving the most resistant blocks standing. UNESCO inscribed the valley in 1999 as a cultural landscape, recognising the traditional tobacco cultivation on the flat valley floor between the towers.
Limestone underlies much of the island, producing extensive cave systems. The Gran Caverna de Santo Tomás in Pinar del Río has over 45 km of mapped passages, among the largest cave networks in Latin America.
A Coastline of Cays, Reefs and Bottleneck Harbours
Cuba's coastline runs to roughly 5,700 km and divides into contrasting northern and southern shores. Extensive archipelagos lie offshore: the Jardines del Rey and Archipiélago de Sabana-Camagüey to the north, the Jardines de la Reina and Archipiélago de los Canarreos to the south, together comprising some 4,195 cays and islets.
The Jardines de la Reina, a chain of mangrove cays roughly 80 km off the southern coast, has been a protected marine park since 1996 and is frequently cited as one of the healthiest reef systems in the Caribbean — with unusually intact populations of sharks and goliath grouper, largely because commercial fishing has been restricted and coastal development is minimal.
The most consequential coastal feature is the pouch-shaped bay. Havana, Santiago de Cuba, Cienfuegos, Guantánamo and Nipe all share the same form: a narrow entrance channel opening into a broad sheltered basin. These are drowned river valleys, flooded when sea level rose after the last glaciation, and they make superb natural harbours that a handful of guns at the entrance can defend — precisely the geography Spanish colonial strategy was built on.
South of the island the sea floor drops away sharply into the Cayman Trench, which exceeds 7,600 m and is the deepest point in the Caribbean, described further in the Caribbean Sea guide.
Hurricane Season and the Red Soils of the Interior
Cuba has a tropical climate with a wet season from May to October and a drier one from November to April. Mean annual temperature is around 25°C, moderated by trade winds, with roughly 1,300 mm of rainfall a year — though the mountainous east and the western Guaniguanico receive considerably more, and parts of the south-east coast near Guantánamo are semi-arid, supporting cactus scrub.
The island lies squarely in the Atlantic hurricane belt, and its length means storms can track along it for hundreds of kilometres. Hurricane Irma in 2017 ran the length of the northern coast as a major hurricane; Hurricane Ian struck Pinar del Río in 2022 and knocked out the national electricity grid. Cuba's civil defence and evacuation system is widely regarded as unusually effective, keeping death tolls low relative to storm intensity.
The soils are the country's quiet advantage. Deep red ferralitic soils, weathered from limestone in the central provinces, are among the most fertile in the Caribbean, and the extensive plains allowed cultivation at a scale impossible on mountainous neighbours. Sugar cane dominated for two centuries. Tobacco is more specialised still: the Vuelta Abajo district of Pinar del Río, a small area of sandy well-drained soil, is regarded as producing the finest cigar wrapper leaf in the world — a reputation resting on a few hundred square kilometres of ground.
Colonial Cities and Cuba's Nine World Heritage Sites
Cuba holds nine UNESCO World Heritage sites, an unusually high number for a country of its size, and most concern urban fabric preserved by circumstance.
Old Havana and its fortifications were inscribed in 1982. The historic centre contains a remarkable density of buildings from the sixteenth to nineteenth centuries — baroque and neoclassical — around four original squares. Their survival owes much to economics: after 1959 investment went elsewhere, so the pressure to demolish and rebuild that transformed most Latin American city centres never arrived. Restoration since the 1990s has been funded substantially by tourism revenue reinvested through the city historian's office.
Trinidad, inscribed in 1988 with the nearby Valle de los Ingenios, is the more complete case. A sugar boom town of the late eighteenth and early nineteenth centuries, it was bypassed when the industry moved and remained economically stagnant for over a century, leaving cobbled streets and pastel mansions essentially untouched. The adjacent valley preserves the ruins of dozens of sugar mills and the slave quarters attached to them.
Cienfuegos, founded by French settlers from Louisiana and Bordeaux in 1819, has a neoclassical grid distinct from Spanish colonial patterns; Camagüey, by contrast, has a deliberately irregular maze of streets, laid out to confuse pirates. Natural sites include Desembarco del Granma National Park, with the world's best-developed marine terraces, and Alejandro de Humboldt National Park in the east — the most biodiverse site in the insular Caribbean, holding species found nowhere else including, historically, the ivory-billed woodpecker.
Cuba Compared With Hispaniola: Two Big Islands, Opposite Terrain
Hispaniola, shared by Haiti and the Dominican Republic, is the natural comparison — the second-largest Caribbean island at about 76,192 km², roughly three-quarters of Cuba's area.
The decisive difference is relief. Hispaniola is genuinely mountainous throughout, with the Cordillera Central rising to Pico Duarte at 3,101 m, the highest point in the Caribbean and more than 1,100 m above Cuba's Pico Turquino. Where Cuba is two-thirds plain with mountains at its edges, Hispaniola is largely mountain with plains squeezed between ranges.
That shapes rainfall and population. Hispaniola's mountains wring far more moisture from the trade winds, producing wetter windward slopes and sharply drier rain shadows — the reason the Dominican Republic's north-east is lush while parts of south-west Haiti and the Enriquillo basin are arid, with Lago Enriquillo sitting about 40 m below sea level, the lowest point in the Caribbean. Cuba's gentler terrain gives it a more uniform climate and no comparable extremes.
Agriculture followed the terrain. Cuba's plains supported industrial-scale mechanised sugar production, concentrating land into large estates. Hispaniola's broken topography favoured smallholdings on hillsides, which in Haiti contributed to severe deforestation and soil loss as population pressure pushed cultivation onto steep slopes. Cuba retains roughly 30% forest cover — up substantially since 1959 — while Haiti's is a small fraction of that.
Politically the contrast is just as sharp: one island holds a single state, the other two, divided by a border drawn through mountains. Neighbouring Jamaica, smaller and also mountainous, sits between the two in character.
Cuba's geography reads as a single argument: a long limestone island of fertile plains and defensible bays, placed at the gate of the Gulf of Mexico. That location made it Spain's strategic keystone, then a sugar colony, then a Cold War flashpoint. The Cuba country guide follows how those forces shaped the country that exists today.