Luon Cave lies on Bo Hon Island, about 14 kilometres from the mainland, and is accessible only by kayak or traditional bamboo boat.
Stretching around 100 metres, its entrance rises between 2.5 and 4 metres depending on the tide. Beyond it lies a still, enclosed lagoon surrounded by steep limestone cliffs, creating the feel of a secluded world within Ha Long Bay.
The cave is included on Ha Long Bay’s sightseeing Route 2, which also features destinations such as Soi Sim Beach, Ti Top Island, Sung Sot Cave, Me Cung Cave, Bo Nau Cave, Drum Cave, Virgin Cave and Fairy Lake.
Among them, Luon Cave stands out for its unspoilt charm.
Unlike Ha Long’s better-known caves, Luon Cave has no stalactites or dramatic lighting. Its appeal lies in its untouched character, with glassy water and a sheltered, enclosed setting that makes it ideal for slow, meditative kayaking.
Visitors who prefer not to paddle can opt for bamboo boats rowed by local residents, a popular choice for families with children and older travellers seeking a relaxed experience.
Adding to Luon Cave’s allure is a troop of wild golden monkeys on the surrounding limestone cliffs. About 50 to 60 are thought to live in the area, often appearing in the early morning or late afternoon to leap across the rocks or watch passing visitors.
Once numbering nearly 200, the monkeys moved elsewhere during the Covid-19 pandemic in search of food. While they now live largely in the wild, occasional feeding by visitors can influence their movements, officials say.
For many travellers, the experience offers a gentler, more reflective vision of Ha Long Bay and a lasting memory of its quieter beauty.