Lava glows in the Halema'uma'u Crater as night falls at Hawai'i Volcano National Park. The crater is currently active, with an open lava vent that ranges from 70 to 150 m below the crater floor. Check out the USGS video here for a more close-up look at the lava at Halema'uma'u. [NOTE: I spent a long time looking at this glow and thinking about the molten center of our planet. Humbling].