A video has gone viral of a GoPro being engulfed by lava flowing from Kilauea Volcano in Hawaii. It belonged to an EcoGuide who left it in a crevice, and then came back after the lava cooled and pulled it out to find the camera's memory card was fully intact.
(He puts it in the crevice at 0:37, and it catches fire at 1:27. You can see him uncovering it at 1:56.)