It is known in Patagonia the term " Bosque Valdiviano" referring to the primitive virgin forest found in the cordillera valleys of Valdivia which include dense masses of native trees.

As German Chilean immigrants arrived in the city during the mid 19th century, the local economy started to develop industries.

In 1974 the military junta reorganized the political divisions of Chile deciding that Valdivia was no longer adequate to be a "first class administrative territory" capital.

An exception to this are the eastern hills in Mariquina and Máfil that despite belonging to the Coast Range system adrift eastwards and comes very close to the Precordillera cutting the Intermediate Depression in two.

Most of the Coast is covered by native Valdivian temperate rain forest, although it has in some parts been substituted by plantations of exotic species, specially Douglas firs and eucalyptus.

Two great agricultural flatlands exist in the region, the Mariquina valley and Los Llanos of La Unión and Río Bueno.

The flatlands and mayor river valleys form large, open, cultural landscapes used as grassing meadows or for growing crops.

The Precordillera is a narrow band characterized by hosting a large number of deep glacial piedmont lakes that are dammed by moraines.

As result of the minimal Andean mountainbuilding the mountains shows little rejuvenation and are mostly shaped by erosive agents, specially glaciers.

The fact that these volcanoes have the ability to build up cones and rise again after erosion and explosive eruptions makes many of them the highest mountains in the region and Zona Sur.

The volcanoes of Los Ríos Regions belong to the Southern Volcanic Zone of Andes, whose current activity front is located about 200 km west from the main Andean cordillera, this makes volcanoes stand out as isolated snow-covered cones of more than 2000 m, above the lower mountains that rarely pass the 1500 m. The main cordillera makes up the continental divide and are therefore according to the 1881 Argentina-Chile treaty the border between the two nations.

Faults and glacier action have however made a gap at the site of Huahum Pass where waters from the eastern Argentine slopes drains westward to the Pacific Mountains at the cordillera may reach at most some 2000 m in height.

Andean valleys of Los Ríos Region are deep and broad and either used for raising cattle or for wood lodging, as well as tourism and protection of biodiversity.

[4] The Valdivia Book Fair is organized annually by the Municipal Cultural Corporation of the city, with the support of the Government of Los Ríos, in the Saval Park.

In this context, several authors born in the Los Ríos Region stand out, such as Maha Vial,[5] Iván Espinoza Riesco,[6] José Baroja,[7] Aldo Astete Cuadra,[8] Efraín Miranda Cárdenas, to name a few.