Angelo Gandolfi / Prehistoric rock painting or geometrical figures. El Castillo cave, Cantabria, Spain.
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Angelo Gandolfi / Griffon Vultures (Gyps fulvus) flying over natural rock arch, El Castillo rocks, Canyon del Ebro and Rudron, Castilla y Leon, Spain.
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Angelo Gandolfi / Griffon vulture (Gyps fulvus) sunning itself on rocks, with others in flight. El Castillo rocks, Canyon del Ebro and Rudron, Castilla y Leon, Spain.
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Angelo Gandolfi / Natural rock arch at El Castillo rocks, Canyon del Ebro y Rudron, Castilla y Leon, Spain.
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Angelo Gandolfi / Moon over Griffon vulture (Gyps fulvus) on El Castillo rocks, Canyon del Ebro and Rudron, Castilla y Leon, Spain.
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Scott Leslie / El Castillo, Mayan ruins, Xunantunich, Belize
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Shane P. White / Temple of Kukulcan (El Castillo) and aloe, Mayan ruins, Chichen Itza, Yucatan, Mexico, UNESCO World Heritage Site
