Check out these amazing shots of the Anak Krakatoa caldera before and after its collapse in December 2018. The first Overview from January 2019 shows rust-colored sulfuric leftovers from the eruption in the surrounding water and the second, taken November 2017, shows smoke and lava flowing out of the caldera about a year before it collapsed. Anak Krakatoa is located in the Sunda Strait between the islands of Java and Sumatra, Indonesia.6°06'01.9"S 105°25'26.9"E