Inside one of Iceland’s black ice caves. The color is due to volcanic ash being mixed when the cave was formed. [OC] [2048x1206] @clueless.tourist

Inside one of Iceland’s black ice caves. The color is due to volcanic ash being mixed when the cave was formed. [OC] [2048x1206] @clueless.tourist via /r/EarthPorn https://www.reddit.com/r/EarthPorn/comments/ivqjkc/inside_one_of_icelands_black_ice_caves_the_color/?utm_source=ifttt