The Daily Mail had this article:
Welcome to the Gateway of Hell: Daring photographer captures rare images of lava lake that's been flowing for over 100 YEARS
which has an amazing 3-minute video of the lava lake. I recommend it. Though I appreciate the efforts the Daily Mail goes to in writing "news" articles about supermodels and other girls with big titties and tight butts, it's useful for other information, too. Occasionally.
Here's a still (the video is better, but this isn't bad):