Pernambuco is shaped like a blade laid east to west, about 98,000 square kilometres of it, and travelling its length is a lesson in how fast Brazil can change climate. The coast is the Zona da Mata, humid and green, historically all sugar. Behind it the land climbs into the Agreste, a transitional belt where the rain thins and the vegetation hardens. Beyond that is the Sertão, high, dry and prone to drought, covered in the grey thorn scrub of the caatinga until the São Francisco River draws the western boundary. What breaks the interior into ranges is the wreckage of an older plateau, eroded down to flat-topped chapadas capped in sandstone. Those chapadas do the state's diplomacy: the Serra dos Irmãos and Serra Vermelha mark the line with Piauí, the Serra do Araripe with Ceará, and the Serra dos Cariris Velhos with Paraíba. Nine and a half million people live across 185 municipalities, most of them crowded onto the wet coastal end.

Brazilwood came first — a licence granted to Fernão de Loronha in 1502, ships from Portugal and then from France, and Indigenous communities willing to cut and haul the timber in exchange for iron tools. Sugar replaced it within a generation. Duarte Coelho arrived in 1535 with a hereditary grant, and by the time the engenhos were running Pernambuco had become one of the few captaincies making real money. That money was extracted from people. The mills first consumed the labour of Tupi and Tapuia communities, and when mortality and expansion outstripped what could be taken from them, Portuguese planters turned to the transatlantic slave trade. Enslaved Africans built and worked the engenhos for three centuries. Some escaped inland and founded mocambos in the hills, the largest of which grew into Palmares, a confederation of settlements that held out against colonial armies for the better part of a hundred years. Its ruins lie just over the southern border, but its story is Pernambuco's.

The state's nickname is Leão do Norte, and it was earned by repetition. A Dutch conquest interrupted Portuguese rule in the seventeenth century and left the coast with a foreign layer that has never fully worn off. In 1817, republicans led by Domingos José Martins and supported by the friar known as Frei Caneca overthrew the crown's governor, held elections and ran a provisional government for seventy-four days before Portuguese troops closed on Recife by land and sea. Seven years later, with Brazil now an empire rather than a colony, Pernambuco led much of the Northeast into the Confederation of the Equator — an independent republic that lasted barely longer than the first attempt. The twentieth century brought its own authoritarianism, Getúlio Vargas for most of 1930 to 1954 and the military regime from 1964 to 1985. The habit persists in a lower key: politics here is loud, and it is rarely deferential.

Carnival in Pernambuco is not the Rio model. Frevo, the state's own music, is fast, brassy and built for a dance that looks like controlled falling; maracatu is slower, heavier, drum-led, and carries its own royal courts and processions. The Galo da Madrugada parade in Recife has held world records for sheer size, drawing more than a million people through downtown on Carnival Saturday. The moment that lingers, though, is quieter. On the Pátio do Terço, in the small hours between Sunday and Monday, maracatu groups gather for the Noite dos Tambores Silenciosos — the Night of the Silent Drums — and stop playing to honour enslaved people who died in the city's prisons. Come back in June and the whole calendar changes: Festa Junina fills fifteen days with bonfires and quadrilha dancing, and Caruaru's São João is the biggest in the state.

Two places complicate the map. Fernando de Noronha, an archipelago of 21 volcanic islands roughly 535 kilometres northeast of Recife, is governed as a sui generis state district with an administrator appointed from the mainland — the visible peaks of a drowned mountain range, far enough offshore to have grown its own marine ecology. Inland, the Borborema throws up pockets of altitude where the thermometer behaves badly for the tropics, dropping toward 8 degrees Celsius in July. Garanhuns, Gravatá, Triunfo, Taquaritinga do Norte and Brejo da Madre de Deus all trade on this, and Garanhuns runs a winter festival built entirely around being cold. Down on the coast, the reef pools of Porto de Galinhas do the opposite work. Sugar still grows, but the economy is now three-quarters services, with a data-processing cluster in Recife and gypsum from Araripina supplying nearly all the plaster used in Brazil.