Wudalianchi

Wudalianchi UNESCO Global Geopark is located in Heihe City, Heilongjiang Province, northeastern China. Named for its 'Five Interconnected Lakes,' the geopark protects one of China's youngest and best-preserved volcanic landscapes, where eruptions in 1719–1721 CE blocked a river to create a chain of lakes connected by congealed lava flows. The site covers approximately 1,060 square kilometres and encompasses 14 shield and composite volcanoes, extensive lava fields, more than 100 lava caves, and the five interconnected lakes. Recognised as a national nature reserve, national geopark, and UNESCO Global Geopark, Wudalianchi is of global significance for volcanology and supports a unique cold mineral spring ecosystem.

The young volcanic soils and distinctive microhabitats of Wudalianchi support a mosaic of wildlife communities. Siberian roe deer, Siberian weasels, and Eurasian badgers are common mammals in the broadleaf forest zones surrounding the lava fields. The five lakes are important stopover and nesting habitats for waterbirds including white-naped cranes, common cranes, and numerous duck species during the spring and autumn migrations along the East Asian-Australasian Flyway. Freshwater fish communities in the interconnected lakes include several species adapted to the cold, mineral-rich waters. The lava tube caves harbour bat colonies. Raptors including the white-tailed eagle hunt over the lake surfaces.

The landscape presents a textbook example of ecological succession on recent volcanic terrain. The 1719–1721 lava flows are still largely barren, with pioneer colonisation by crustose lichens and mosses just beginning. Earlier eruption zones from thousands of years ago have developed thin soils supporting heath-like communities of dwarf pines, birches, and arctic-alpine shrubs. The surrounding plains support temperate deciduous forests dominated by Mongolian oak, white birch, and Dahurian larch. The wetland margins of the lakes have dense reed beds and sedge marshes. The cold mineral springs support unique communities of algae and aquatic mosses tolerant of the high mineral content. About 700 vascular plant species have been recorded.

Wudalianchi represents an active volcanic field within the eastern Asian continental rift zone, featuring 14 volcanoes of different ages and eruption types. The most recent eruption sequence in 1719–1721 produced the Laoheishan and Huoshaoshan volcanoes, which are among the best-preserved and most accessible young volcanoes in the world. Their lava flows dammed the Beixiahe River, creating the five interconnected lakes. The lava types include pahoehoe (smooth, rope-like surfaces) and aa (jagged, blocky flows), and an extensive system of lava tube caves formed as the surface cooled while molten rock continued flowing beneath. Cold mineral springs (rich in CO₂, iron, and calcium) emerge from faults in the volcanic rock and have been used medicinally for centuries.

Wudalianchi experiences a severe continental climate typical of northeastern China. Winters are extremely cold, with average temperatures of −20 to −25°C from December through February and occasional lows approaching −40°C. The growing season is short, from May to September, with warm summers where temperatures can reach 30°C. Annual precipitation is modest at 550–650 mm, primarily concentrated in summer thunderstorms. Heavy snowfall covers the lava fields and lakes from November through March, creating dramatic winter landscapes. Spring is brief but spectacular, with wildflower blooms on the volcanic plains. The frozen mineral spring surface in winter creates colourful ice formations prized by photographers.

The Wudalianchi volcanic eruption of 1719–1721 is one of the few major volcanic events in Chinese history recorded in written documents, including official provincial records describing the fires in the mountains and the flooding caused by the river blockage. Local Daur and Mongol communities inhabited the surrounding plains for centuries and were directly affected by the eruption. The cold mineral springs at Wudalianchi were recognised early for their reputed health benefits, attracting visitors from across northeast China. A sanatorium was established in the Soviet-influenced development of the 1950s, and the area became a domestic health tourism destination, a tradition that continues. The springs were particularly studied by Russian-Chinese scientific expeditions.

Wudalianchi was designated a National Nature Reserve in 1980, recognising both its volcanic geological significance and its biological value. The site was included in China's national geopark system in 2001 and elevated to UNESCO Global Geopark status in 2004. The five-lake scenic area has been a managed tourism destination since the 1950s, and the geopark framework has brought improved interpretation and geological conservation alongside ongoing health tourism. Scientific research programmes focusing on volcanology, mineralogy, and the unique cold spring ecosystems have been conducted by Chinese and international researchers. The reserve maintains close ties with the local city government, as the mineral spring water is commercially bottled and sold nationally.

The Laoheishan volcano cone can be climbed via a well-maintained trail, offering views over the entire volcanic field and lava flow landscape. The underground lava caves (particularly Bingdong and Huigu caves) are major attractions, with frozen water ice formations persisting year-round in the deeper sections. The five interconnected lakes offer boat tours and shoreline walking paths. The Yaoquan Spring area features the most accessible mineral spring outlets, with stone basins for drinking and bathing. A comprehensive geopark museum provides geological interpretation. In winter, ice sculpture festivals and frozen lake activities attract visitors, while summer is best for birdwatching on the lakes.

Wudalianchi City, adjacent to the geopark, is connected by road from Heihe (80 km, 1.5 hours) and by bus from Harbin (6 hours). No railway directly serves the site; most visitors arrive by bus or private vehicle. Accommodation within and around the geopark ranges from the established sanatorium resort complexes (emphasising mineral spring spa treatments) to standard hotels in Wudalianchi town. The geopark entrance includes most scenic areas; individual attractions may have separate fees. The cold spring bottled water is sold throughout the area. Summer (June–August) is peak season for outdoor activities; winter (December–February) attracts visitors for ice landscape and spa experiences.

The primary conservation challenge at Wudalianchi is protecting the integrity of the young volcanic landforms—particularly the Laoheishan and Huoshaoshan lava fields—from pedestrian erosion and souvenir collection. Boardwalk trails have been installed in the most fragile sections. Commercial extraction of mineral spring water is carefully monitored to prevent over-pumping that could reduce spring flow. Pollution prevention in the watershed catchment is essential to maintaining water quality in the five lakes. Climate change is affecting winter ice duration on the lakes, impacting both wildlife habitat and winter tourism. A community education programme works with local residents on sustainable use of geopark resources.