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出典:Wikipedia
出典:『Wikipedia』 (2011/02/06 09:37 UTC 版)
Matienzo is the name of a village and a karst depression some 25 km southeast of Santander in Cantabria, northern Spain. The limestone around Matienzo is riddled with caves (up to 53 km in length) which have been extensively explored over the last 50 years by Spanish and British cavers.
Matienzo