View of the The Caves of Hercules in Cape Spartel, Morocco
Boca do Inferno (Hell’s Mouth) sea cave and natural rock arch on coast of Cascais, Portugal
Sea cave at Pismo Beach with a rocky foreground at sunset, California, USA
Cave on the sea bay and turquoise water, Porto Flavia harbor, Iglesias, Sardinia, Italy
Sunbeams penetrating at Ik-Kil cenote inlet opening, Tinúm Municipality, Yucatán, Mexico
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