Tirúa is a Chilean commune and town in Arauco Province, Biobío Region. The 2010 Chile earthquake led to a permanent uplift of Tirúa of about 180 cm above sea level, the highest recorded uplift related to the earthquake. This caused a large islet to form at the mouth of Tirúa River next to the town. The Misión Jesuita Mapuche is based in Tirúa.

Lota is a city and commune located in the center of Chile on the Gulf of Arauco, in the southern Concepción Province of the Biobío Region, 39 kilometres south of Concepción, and is one of the ten cities (communes) that constitutes the Concepción metropolitan area. The city is mostly known for being the traditional centre of coal mining in Chile, albeit mining ended in the 1990s.