The Jungle Boss expedition team recently discovered a mysterious lake, unexpectedly deep and cold, located in the core zone of Phong Nha – Ke Bang National Park (Quang Binh).
The lake, about 10 square meters in size, was discovered by Jungle Boss in July.
At the end of July, during a return visit to the Hanging Lake (discovered in early May), the Jungle Boss expedition team—a company specializing in adventure tours exploring caves in Quang Binh—accidentally found a strange lake near the entrance of Thung Cave (part of the Hung Thoong system), about 1 km from the hanging lake.
The lake is only about 10 meters wide, surrounded by a lot of mud and dirt, with clear, still water. The most remarkable features are its depth and temperature.
The lake is small but has a deeper depth than the main stream around it.
Speaking with Tri Thuc – Znews on October 7, Le Luu Dung, Director of Jungle Boss, stated that after a preliminary survey, the exploration team recorded the distance from the surface to the bottom of the lake as being over 12 arm spans, equivalent to nearly 18 meters—an incredible depth for such a small surface area.
“Initially, we didn’t pay much attention to this small depression filled with water due to its size. However, when we swam in it, the team noticed an overhanging structure at the bottom. We then used a fishing line with a stainless steel keychain attached and started lowering it to measure the depth. We were surprised by how extremely deep the lake was—deeper than the water level of the main river in Thung Cave,” Dung explained.
In addition to its unusual depth, the lake’s temperature is about 16 degrees Celsius, much colder than other lakes in Thung Cave, which range from 18-20 degrees Celsius. The company plans to include this area in its tourism offerings to provide visitors with a unique experience.
The lake has blue water and a temperature of about 16 degrees Celsius.
A representative from Jungle Boss suggested that the lake might be connected to another underground cave system within Thung Cave, potentially leading to a large cave at its base.
However, this is only a preliminary hypothesis, and further expeditions with more equipment will be required to conduct additional surveys.
In addition to this mysterious, as-yet-unnamed lake, the exploration team discovered the Hanging Lake in May, 1 km from the entrance of Thung Cave. The unique feature of this lake is that it sits about 15 meters higher than the main underground river in the cave, as if suspended on the cave wall.
According to Dung, the bottom of this lake remains a mystery, although its crystal-clear waters allow for visibility. The current estimated depth of the Hanging Lake is about 7-8 meters.
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Source: Vietnam Insider