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Fogbows in the bleak volcanic landscape of Teide National Park on the island of Tenerife pictured by Roberto Porto. "..the sea of clouds was very high and reached the base of Mount Teide at 2190 m above sea level. The sun was at my back and the clouds moved very quickly. I saw something strange in the clouds, I pointed both cameras to that area and waited. A clear fog bow appeared just in front of the volcano." See time-lapse video   Images ©Roberto Porto, shown with permission