Penablanca, Cagayan Province, Philippines - May 19, 2008: Sunlight enters one chamber of the limestone Callao Cave through a hole in the roof

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Size: 3872px × 2592px
Location: Peñablanca, Cagayan, Philippines
Photo credit: © Michael Wels / Alamy / Afripics
License: Royalty Free
Model Released: No

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