History
Before the Spanish arrived, the Nicoya Peninsula and the Tempisque basin belonged to the Greater Nicoya cultural area, which also took in the Pacific coast of Nicaragua. Its people are best known for their painted polychrome pottery and carved jade, and at the time of the conquest the Chorotega, a people of Mesoamerican origin, lived here in chiefdoms. The Spanish arrived in the 1520s, and the chief Nicoya gave his name to the peninsula.
In colonial times Nicoya was for long periods governed from Nicaragua, and large cattle haciendas spread across the savannah. After independence the Partido de Nicoya voted to join Costa Rica, and 25 July 1824 is still celebrated as the Annexation of Nicoya, a national holiday. The border with Nicaragua was fixed by the Cañas–Jerez treaty of 1858. The province took its name, Guanacaste, from the broad-crowned tree that is now the national tree.
Guanacaste's great historical moment came in March 1856, when Costa Rican troops defeated the forces of the American filibuster William Walker at Hacienda Santa Rosa. For a century afterwards the province remained a remote cattle frontier, until the Inter-American Highway, the airport at Liberia and the bridge over the Tempisque tied it to the rest of the country. From the 1990s beach tourism, resort building and foreign settlement transformed the coast, while the protected areas around Santa Rosa became one of Costa Rica's World Heritage Sites.
