1 / 3   Photos show snow-covered No.5 and No.6 volcano at Ulan Hada volcano group near Ulan Qab City, north China's Inner Mongolia Autonomous Region. /Xinhua Photo

2 / 3   The Ulan Hada volcano group is a chain of volcanoes which stretches on for almost a thousand kilometers. The slopes of most of these are covered by forests, camouflaging their appearance. /Xinhua Photo

3 / 3   Their unmistakable conical shapes are clearly visible, rising majestically above the flat steppe. The Ulan Hada volcano group erupted during the Holocene epoch (beginning approximately over 10,000 years ago). /Xinhua Photo