On the morning of August 14, 2025, Nguyen Quoc Manh, a 33-year-old nature enthusiast from Hai Phong city, set out alone to explore the ancient forests of Cuc Phuong National Park in northern Vietnam. What began as a solo adventure through one of the country’s most storied natural reserves has since turned into a harrowing mystery, captivating public attention and mobilizing a massive search effort that, after five days and four nights, has yet to yield any trace of the missing traveler.
According to Dân Trí and multiple Vietnamese news outlets, Manh arrived at the Bong area of Cuc Phuong National Park on August 13, purchasing an entry ticket and renting a room like any other visitor. But, unlike most tourists, he chose to venture into the dense forest alone. On the morning of August 14, he set off on the park’s main thousand-year-old tree trail, a well-known route for eco-tourists, before heading into the mysterious Son Cung cave. There, he left his backpack at the cave entrance—a detail that would later become a crucial clue in the search for his whereabouts.
By 3 PM that same day, a foreign tour guide discovered Manh’s abandoned backpack at the cave’s mouth. Unable to locate its owner, the guide alerted the local forest rangers. The authorities quickly realized that Manh had not emerged from the cave, and a full-scale search was launched, involving forest rangers, police, local military personnel, and volunteers. The urgency only grew as hours turned into days, with no sign of the missing explorer.
Manh’s family, deeply concerned for his safety, promptly reported his disappearance to the police and traveled to Cuc Phuong to support the search. His mother, in an interview with Bao Quang Ninh, shared her worries: "We have informed the authorities and hope for our son’s safe return." She described Manh as someone with a lifelong passion for nature and adventure, noting his previous volunteer work in ecological conservation at the very same national park. "He’s always been drawn to the wild, and he’s prepared for these trips with all the necessary gear—jackets, flashlights, and supplies," she said. But even for an experienced explorer, Cuc Phuong’s labyrinthine caves and dense jungle can be perilous.
By August 18, the search had swelled to over 100 people, divided into 11 teams, including police with search dogs, forest rangers, local soldiers, park staff, and relatives. The teams scoured the area around Son Cung cave and expanded their search into neighboring Thanh Hoa and Hoa Binh provinces, covering a dauntingly large and rugged terrain. Heavy rain, poor visibility inside the caves, and the absence of phone signal only complicated the already challenging rescue operation. "The search area is vast, and the lack of communication makes coordination very difficult," admitted a park official to Vietnamnet.
Despite these obstacles, the search teams pressed on. It was during these exhaustive efforts that a glimmer of hope—and a deepening mystery—emerged. Deep within Son Cung cave, searchers discovered inscriptions carved into the cave wall. The markings read: "34 HD, TM, 2025, HANG." Authorities believe the writing could be Manh’s, possibly left as a desperate message or marker as he tried to navigate his way out of the cave’s darkness. "We found the writing on the first day of the search, but we can’t yet confirm it’s his," a Cuc Phuong National Park official told Dân Trí. Still, the discovery has become a focal point for investigators, fueling speculation that Manh, after leaving his backpack at the entrance, ventured deeper into the cave, became disoriented, and tried to leave a sign for rescuers or future explorers.
Mr. Dinh Van Xuan, a member of one of the search teams, described to Dân Trí the painstaking efforts underway: "Our team, led by Ranger Dung and Manh’s brother Bao, was assigned to search the area near the waterfall, about 2-3 kilometers from the cave." The teams have worked around the clock, braving treacherous terrain and heavy downpours, driven by the hope of finding Manh alive. The search has even enlisted the help of seven trained search dogs from the Ninh Binh Police, as well as volunteers from surrounding communities.
The circumstances surrounding Manh’s disappearance have prompted renewed warnings from park authorities. "We always advise visitors to strictly follow safety rules, travel in groups, and seek guidance from park staff," a Cuc Phuong National Park leader told Bao Quang Ninh. The official noted that while Manh was well equipped and experienced, solo exploration in the park’s challenging conditions can be extremely risky, especially in areas like Son Cung cave, where darkness and confusing passageways can easily lead to disorientation.
Manh’s mother offered her own theory on what might have happened. "When he reached a small cave in Cuc Phuong, the entrance was narrow, so he may have left his backpack outside to go in and explore. Coming out, he could have gotten lost, as the cave’s middle section is extremely dark. If you venture further in, it gets darker, and you need multiple flashlights. Sometimes, a shaft of light from above can mislead someone into thinking it’s the exit, but following it could lead you deeper into the cave or to a dead end." Her words echo the fears of many familiar with the park’s geography—what looks like a path to safety might, in fact, be a false lead.
The case stands out even among Cuc Phuong’s history of lost hikers. According to park officials, while there have been previous incidents of tourists getting lost in the forest, they were all found after relatively short searches. Manh’s prolonged disappearance is, in their words, "a special case." The mystery of the cave inscription and the lack of any further clues have only deepened the anxiety of his family and the resolve of the search teams.
As of August 18, 2025, there is still no sign of Nguyen Quoc Manh. The search continues, undeterred by rain, darkness, or fatigue. Authorities, family, and volunteers remain united in their hope for a breakthrough, clinging to the possibility that Manh, prepared and resourceful as he was, may still be waiting to be found somewhere in the vast, ancient wilderness of Cuc Phuong.
For now, the forest keeps its secrets. But the determination of those searching—and the haunting message left on a cave wall—ensure that Manh’s story will not be forgotten, as efforts to bring him home continue without pause.