Estero Calbuco River in Chile From Wikipedia, the free encyclopedia Estero Calbuco is a creek in Biobio Region of Chile.[1] References [1]"Estero Calbuco, Chile". Geonames.org. Retrieved 2010-07-26. 37°38′S 72°22′WThis Biobío Region location article is a stub. You can help Wikipedia by adding missing information.vteThis article related to a river in Chile is a stub. You can help Wikipedia by adding missing information.vte Related Articles