3位 Photograph by Greg C., 2017 National Geographic Nature Photographer of the Year/On the flanks of Kilauea Volcano, Hawai’i, the world’s only lava ocean entry spills molten rock into the Pacific Ocean. After erupting in early 2016, the lava flow took about two months to reach the sea, six miles away.
1位 Photograph by Karim Iliya, 2017 National Geographic Nature Photographer of the Year/Shortly before twilight in Kalapana, Hawai’i, a fragment of the cooled lava tube broke away, leaving the molten rock to fan in a fiery spray for less than half an hour before returning to a steady flow.