The Enchanted Lake: A Magical Discovery in Quang Binh Province’s Cave

Our survey team at Junglee Boss Co., Ltd. has made a thrilling discovery in the heart of Quang Binh: a mysterious lake nestled within a sub-branch of the majestic Thung Cave system in Hung Thoong. This hidden gem, located in Phong Nha town, Bo Trach district, promises to be an enchanting addition to the region's renowned natural wonders.


A stunning and enigmatic lake has recently been uncovered in the heart of the Thung Cave, nestled within the breathtaking Phong Nha-Ke Bang National Park, a UNESCO World Natural Heritage site in Vietnam’s central province of Quang Binh.

The lake’s discovery is owed to the adventurous spirit of the Junglee Boss adventure tourism company, whose expedition led them deep into the cave’s mysterious depths.

It was a challenging journey for the team, involving two days of trekking through dense forest, an exhilarating zip-line descent into the cave, and an underwater exploration of the Hung Thoong cave system’s underground river. Their perseverance paid off as they stumbled upon a previously untouched cave floor, marked by the breathtaking sight of a giant emerald green lake.

The cave’s entrance, an inviting portal to the wonders within. Photo: Le Luu Dung
An awe-inspiring view of the cave’s interior. Photo: Le Luu Dung

This hidden gem, situated approximately one kilometer from the cave’s entrance, is nestled within one of the area’s most pristine and untouched caverns, deep within a strictly protected zone of the national park. Its location is truly unique, as it sits about 15 meters higher than the main underground river branch, giving the illusion of floating on the cave wall.

The lake’s altitude sets it apart, with its waters resting at a much higher level than the surrounding cave. Photo: Le Luu Dung

Surrounded by majestic stalactite columns and an underground river system, the lake boasts a transparent emerald green hue that is simply mesmerizing. The source of its water remains a mystery, adding to the intrigue of this natural wonder.

The exploration team also discovered a passage along the cave wall that traverses the main underground river branch, further emphasizing the complexity and vastness of this cave system.

An intimate glimpse into the cave’s captivating beauty. Photo: Le Luu Dung

Due to equipment limitations, the depth of the lake remains unknown, and the source of its water is yet to be determined. However, its unique location inspired the survey team to name it Lo Lung, or “Floating” Lake, reflecting its ethereal presence within the cave.

The team plans to return to the cave before the rainy season to ensure their safety and continue their exploration, hopeful to uncover more hidden wonders and possibly discover a new cave system within Thung Cave.

Phong Nha-Ke Bang National Park is renowned for its breathtaking beauty and ecological significance, having been recognized as a World Heritage site twice. It boasts an impressive array of over 300 magnificent caves, including the world’s largest, Son Doong, the third-largest, En Cave, and Asia’s longest dry cave, Thien Duong (Paradise) Cave, making it a highly sought-after destination for adventurers and nature enthusiasts alike.

Hannah Nguyen