The place on Earth from which you can, in theory, see further than any other is between an unnamed Himalayan ridge near the Indian-Chinese border and Pik Dankova in Kyrgyzstan. It is just over 530km.
Scientists warn hundreds of dormant volcanoes could soon erupt
"Glaciers tend to suppress the volume of eruptions from the volcanoes beneath them. But as glaciers retreat due to climate change, our findings suggest these volcanoes go on to erupt more frequently and more explosively."