I went caving while in Florida. I found that the best way to take a photo in a cave is to use a long exposure to capture the minimal light the existing lights provide for the background, plus steal someone else's flash for the foreground. This gives the best play between light and dark textures, making the rock formations and colours stand out the most.
Named after Kerath, the first ruler of D'ni from the Myst series of games. Because it reminded me of the D'ni cavern.