The huge crater of the Ksudach volcano is surrounded by vertical walls. Inside the crater you can see a huge red crater. This is Steubel's crater, the site of a huge explosion in 1907. The eruption was so strong that volcanic dust was blown into the upper atmosphere and spread across the planet. A crater and a lake were formed on the site of the exploded cone, which were named after the German volcanologist and traveller Moritz Stübel. There are no roads to the volcano. It was necessary to cross fords, drive through mountain passes, wild forest and volcanic ash.