Callio

Callio Pyhäsalmi
Old tower and surrounding buildings of Pyhäsalmi mine
Callio Pyhäsalmi
Coordinates: 63°39′36″N 26°02′28″E / 63.659902°N 26.041062°E / 63.659902; 26.041062

Callio is a project to oversee the reuse of the Pyhäsalmi Mine, located in the town of Pyhäjärvi in Finland. Callio aims to make Pyhäsalmi Mine an operating environment for businesses and an underground research facility.

Callio is a joint project by the town of Pyhäjärvi and the University of Oulu. In 2017 the facility joined the "Baltic Sea Underground Facilities and Innovation Network" (BSUIN).

The word ”callio” is an anglicised version of the Finnish word ”kallio” [kael-lee-oh], meaning crystalline bedrock.

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