Photo taken on Sept. 2, 2021 shows a limestone cave in the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua
Aerial photo taken on Sept. 2, 2021 shows the scenery of the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua
Aerial photo taken on Sept. 2, 2021 shows the scenery of the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua
Aerial photo taken on Sept. 2, 2021 shows the scenery of the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua
Aerial photo taken on Sept. 2, 2021 shows the scenery of the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua
Aerial photo taken on Sept. 2, 2021 shows the scenery of the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua
Aerial photo taken on Sept. 2, 2021 shows the scenery of the Wudalianchi Geopark in Heihe, northeast China's Heilongjiang Province. The Wudalianchi Geopark is famed for its volcanoes and hot springs. It has 14 volcanoes and five major volcanic barrier lakes.Photo:Xinhua