CHINA 5A TRAVEL
Northern Guangdong's 5A karst wonder: walk glowing stalactite galleries, then boat a 1,500-m underground river through three lit gorges — all at 18–22°C.
Lianzhou Underground River (连州地下河) is the flagship 5A attraction of northern Guangdong, rated in 2011 and still Qingyuan's headline sight. A local farmer found the cave in the early 1980s in the karst belt of the Nanling Mountains; it opened to visitors in 1986 and won the late Guangdong writer Qin Mu's praise as 'a mysterious and magnificent underground river'. Its limestone was laid down some 200 million years ago on an ancient seabed where Guangdong now meets Hunan and Guangxi, and every centimetre of dripstone has taken roughly a century to grow.
The numbers behind the wonder: a cave about 1,860 m long with chambers up to 47.8 m high and some 60,000 m² open to visitors, stacked on three levels — two dry walking galleries above, a navigable underground river below. This is the rare 'cave within a cave' layout, where caves, rivers, bridges and even waterfalls nest inside one another; from natural bridges you look straight down onto the river. Nearly 100 named formations fill the halls, from the 30-metre Sky-Supporting Pillar to the terraced pools of the Fairy Fields, while the air holds a constant 18–22°C at 96–98% humidity — a natural air-conditioner, cool in summer and warm in winter.
The visit is a one-way circuit of 1.5–2.5 hours: a forested uphill walk through the 62.1-ha karst valley to the cave mouth, dry galleries on foot with a guide narrating the stones, then the climax — boarding an open boat at the underground dock for a 10–20-minute float down the 1,500-m river through Banana, Lotus and Dragon-Gate gorges, where lit water and low-hanging stalactites earn the stretch its nickname, the 'Underground Milky Way'. The cave sits 26 km northeast of Lianzhou's old town and plays best as a weekend pairing with the Huangchuan Three Gorges cruise and Millennium Yao Village.
Highlights
Three Levels in One Cave
Caves within caves, rivers within caves, bridges within caves — two dry galleries stacked above a navigable river, with walkways that look down on the water.
Underground River Boat Ride
Board an open boat at the underground dock and drift the lower river, stalactites within reach overhead — a 10–20-minute ride that feels like crossing a star chart.
Three Gorges of the Deep
The boat threads Banana Gorge (香蕉峡), Lotus Gorge (莲花峡) and Dragon Gate Gorge (龙门峡) — from lake-wide stretches to a squeeze barely wide enough for the hull.
Fairy Fields (仙人田)
Rimstone pools stacked like terraced farmland 'ploughed by immortals', their clear water glittering under the lights — the cave's signature formation.
A Hundred Named Stones
Golden Rooster Heralds the Dawn, Flying Elephant Crossing the River, Waterfall Curtain, South Heaven Gate, Magpie Bridge and the 30-m Sky-Supporting Pillar — nearly 100 named sculptures.
A Natural Air-Conditioner
Constant 18–22°C and near-saturated humidity year-round — a summer retreat below ground, wrapped in a forested karst valley above.
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