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Ben and Ange - On the Road

Treking the Cordillera Blanca (aka Carlos and the Frozen Boots)

Its a hole.  Ventilation and/or light source for the underground sections.  They even used mirror-like stones underground to further channel the light.  Clever or what?

PERU | Wednesday, 6 August 2008 | Views [207]

Its a hole. Ventilation and/or light source for the underground sections. They even used mirror-like stones underground to further channel the light. Clever or what?

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