San Rafael District, La Unión

Tres Ríos (lit. 'Three Rivers') is a district of the La Unión canton, in the Cartago province of Costa Rica. Its name is derived from its location at the confluence of the Tiribí, Chiquito and Cruz rivers. According to the 2011 census, Tres Ríos had a population of 9,331 inhabitants. The district has an area of 2.19 km² and an elevation of 1,345 metres.

The Ochomogo War was a civil war fought in Costa Rica, the first in its history, and was fought shortly after the country became independent from Spain. The most important event was the Battle of Ochomogo (5 April 1823) which was fought on Ochomogo Hill, from which it takes it name, to the west of Cartago, Costa Rica. Republican militia from San José and Alajuela led by Gregorio José Ramírez defeated conservative forces from Cartago, the colonial capital, who supported making Costa Rica part of the new Mexican Empire. The Republicans won the battle and San José became capital of the country, which remained independent within the Federal Republic of Central America.

Ochomogo is a location in the province of Cartago, Costa Rica. It is in a mountain pass between the cities of San José and Cartago. It was the site of the Battle of Ochomogo (5 April 1823) between those who wanted Costa Rica to join the newly formed First Mexican Empire and those who preferred independence.

San Nicolás is a district of the Cartago canton, in the Cartago province of Costa Rica.

La Unión is a canton in the Cartago province of Costa Rica. The head city is in Tres Ríos district.

Carpintera Hills Protected Zone (Spanish: Zona Protectora Cerros de la Carpintera), is a protected area in Costa Rica, managed under the Central Conservation Area, it was created in 1976 by executive decree 6112-A.

San Diego is a district of the La Unión canton, in the Cartago province of Costa Rica.

Dulce Nombre is a district of the La Unión canton, in the Cartago province of Costa Rica.

Concepción is a district of the La Unión canton, in the Cartago province of Costa Rica.

Outward Bound Costa Rica (OBCR) (formerly known as "Costa Rica Rainforest Outward Bound School" or CRROBS) is a non-profit experiential learning and outdoor education organization based in San José, Costa Rica. It is a charter of Outward Bound International (OBI).

San Juan is a district of the La Unión canton, in the Cartago province of Costa Rica.

San Ramón is a district of the La Unión canton, in the Cartago province of Costa Rica.