Best Underground River
The Jeita Grotto is a remarkable karst cave system located in Lebanon. It features two distinct levels showcasing impressive limestone formations including one of the world’s longest stalactites within its upper gallery. The grotto also contains an underground river vital to the local ecosystem. It'...
Kong Lor Cave is a limestone river cave in Khammouane Province, central Laos, through which the Nam Hinboun River passes beneath a mountain for roughly 7.5 kilometers. Visitors commonly traverse the mostly dark passage in narrow motorized boats, with part of the journey including a lit walking secti...
The Gouffre de Padirac is a major karst chasm and developed show cave in the Lot department of southwestern France. Visitors descend into the open shaft, continue through galleries, and travel by boat along part of an underground river before walking through chambers containing large stalactites, fl...
Tham Nam Lod is a karst river cave located in Mae Hong Son Province, Thailand, known for its active underground watercourse. Visitors typically navigate the cave's massive limestone chambers using bamboo rafts guided by local handlers. The site is highly notable for its large stalactites and the pre...
The Grotte de Han-sur-Lesse is an extensive limestone cave system in Belgium, formed by the underground course of the Lesse River. The river enters the karst massif and emerges on the opposite side, creating a network of large subterranean passages. The cave features notable geological formations su...
Benxi Water Cave is a large flooded limestone karst cave system located in Liaoning Province, China. Its primary feature is a massive underground river that stretches over five kilometers, allowing visitors to take underground boat cruises through the illuminated cavern. The cave maintains a stable...
The Punkva Caves are a subterranean karst cave system located in the Moravian Karst nature reserve near Blansko in the Czech Republic. Formed by the underground flow of the Punkva River, the system is notable for its extensive network of limestone passages and dripstone formations. As a public show...
Planinska Jama, also called Planina Cave, is a limestone cave near Planina in southwestern Slovenia. Its underground passages contain the confluence of the Pivka and Rak rivers, which meet inside the cave to form the Unica, a notable example of subterranean drainage in the Classical Karst region. Th...
The Grotte de Remouchamps is a limestone show cave in Wallonia, Belgium, near the Amblève valley. Its guided route combines a walking section through chambers and passages with a return journey by boat along the underground Rubicon River, which is commonly described as one of the longest subterranea...
Goa Pindul is a river cave in Yogyakarta, Indonesia, notable for popularizing cave tubing, where visitors float through the karst tunnel on inner tubes.
Show cave in the Ligurian Alps of Piedmont, Italy, notable for hosting one of the world's first permanent underground scientific research stations, established in 1969.
Underground river cave near L'Aquila, Abruzzo, Italy, through which the Stiffe stream flows, creating cascades and emerald pools visible to visitors on a guided walkway.
