The Weirdest Geographic Mysteries In Malaysia

Somewhere off the coast of Sabah, there is an underwater cave that turtles swim into and never swim out of. The floor is covered in their shells. Divers have died in there too. On a river plain in Kedah, the oldest civilization anyone has found in this country sat quietly under the oil palms for centuries. And in 2013, a developer bulldozed an 1,800-year-old temple before anyone could stop him. And under a mountain in Sarawak, there was a room so large that the men who found it stood in the middle, with lamps that could not reach the far wall, and had no idea what they were standing in. The Malaysia you think you know. Twin towers, island resorts, street food at night. That's the part they let you see. Underneath is something older and stranger. So here's the question. What is Malaysia actually hiding? We found 20 answers, counting down from both halves of the country to the single weirdest geographic mystery in it. Let's get into it. Kicking us off at 20, the town with 700 kilometers of tunnels underneath it. Sungai Lembing in Pahang was once called the El Dorado of the East, and for nearly a century, it ran one of the deepest and most extensive underground tin mines in the world. The workings go down several hundred meters, and the tunnel network has been estimated at over 700 kilometers, stacked in levels beneath the valley floor, worked by thousands of men. Then, in 1986, the tin price collapsed, the company shut the mine, and the town emptied almost overnight. What's left on the surface is a quiet settlement of a few thousand people and a museum. What's underneath is a flooded three-dimensional maze that nobody has fully surveyed since the day it closed. Off Sipadan, an island in the Celebes Sea, an opening in the reef wall leads into a flooded limestone cavern. Green turtles swim in, apparently disoriented, and some of them cannot find the way back out to breathe. Divers have counted skeletons and shells scattered through the passages, some of them clearly there for a very long time, which is why it's known as the Turtle Tomb. It is genuinely dangerous. The passages silt easily, the exits are not obvious, and divers have died in there over the years. Access is now tightly controlled. A reef that photographs like paradise has a room in it that functions, for anything that swims in without a plan, as a trap. Coming in at 18, the flower that arrives without a plant. Rafflesia opens on the forest floor across Malaysia, sometimes nearly a meter across, the largest single flower on Earth. And there is no plant attached to it. No leaves, no stem, no roots. It's a parasite that lives entirely inside a vine, invisible for months, and then pushes out a cabbage-sized bud that swells for the better part of a year before opening. It smells like rotting meat to draw flies, stays open for a few days, and collapses into black slime. You cannot cultivate one. Finding one in bloom is almost entirely luck, and guides in Perak and Sabah run informal phone networks purely to track which buds are about to open. Landing at 17, the lake that's supposed to have a city underneath it. Tasik Cini in Pahang is Malaysia's second-largest natural freshwater lake, a system of interconnected basins that fills with lotus flowers in season. Local Jakun tradition holds that an ancient walled settlement lies beneath the water, sunk deliberately, and that a serpent called Naga Serigumum guards what's left of it. Divers and researchers have gone looking more than once. Nothing conclusive has come up. What is not in dispute is that the lake is in serious trouble. Mining and land clearing upstream have changed the water so badly that its UNESCO Biosphere Reserve status has been openly questioned. Sitting at 16, the cave with a 40,000-year-old skull and men climbing bamboo in the dark. Nia in Sarawak has one of the largest cave mouths in the world, and in 1958, archaeologists recovered a human skull from its floor dated to roughly 40,000 years ago, among the oldest modern human remains in Southeast Asia. People were sheltering under that overhang while northern Europe was still buried under ice. And the cave is still worked today because swiftlets nest on the ceilings and build their nests almost entirely from hardened saliva, the key ingredient in bird's nest soup. Harvesters climb lashed bamboo poles 60 meters up into the roof, in the dark, to reach them, and people have fallen doing it. Next up, 15. The tip of mainland Asia is a boardwalk in a mangrove swamp. Ask people where the Asian mainland ends and most will guess Singapore. It doesn't. The southernmost point of continental Asia is Tanjung Piai in Johor, and it is deeply unimpressive to look at. Mudflats, mangrove, a walkway on stilts, and a globe sculpture at the end. Container ships slide past a few hundred meters offshore, heading into one of the busiest waterways on Earth. An entire continent finishes in a tidal swamp, and most people standing at the viewing point have no idea what they are standing on the end of. At number 14, a shipping lane that used to be a river valley. The Strait of Malacca carries roughly a quarter of the world's traded goods, and it is not a deep ocean channel. It's a drowned shelf. During the ice ages, sea level sat far lower, and this was low ground with rivers running across it. When the sea came up, it flooded a valley, which is why the strait is shallow and narrow rather than open water. In places, the navigable channel pinches to under two miles wide, and the constraint is tight enough that the largest vessels on Earth are classified by whether they can physically get through. A flooded river valley off the Malaysian coast sets the maximum dimensions of the global merchant fleet. Number 13, the mountain that is still growing and lost part of itself in seconds. Mount Kinabalu rises 4,095 meters in Sabah, the highest peak between the Himalayas and New Guinea, a granite dome pushed up through the crust and still creeping upward a few millimeters a year. In June 2015, a magnitude 6 earthquake struck the mountain, killed 18 people on its slopes, many of them climbers and guides, and snapped one of its famous summit pinnacles clean off. A skyline photographed for a century changed shape in under a minute. For the Kadazan Dusun, the summit is where the spirits of the dead gather, which is why the aftermath of that earthquake involved ceremony on the mountain as well as engineering. Coming in at 12, one mountain with more plants than two continents. Kinabalu's slopes hold something like 5,000 to 6,000 plant species, a figure often described as more than Europe and North America combined. Climate and the vegetation shifts from lowland rainforest through mossy cloud forest to stunted scrub and then bare granite in a single day's walking. It also grows the giant montane pitcher plant, found on that mountain and nowhere else on Earth, whose traps hold several liters of fluid and have been found digesting drowned rodents. A jug the size of a football sitting on a mountainside in Borneo that eats rats. Landing at 11, the paintings of the boats that carry the dead. Deeper into the Nia system is a chamber called the Painted Cave, where a long panel of red hematite figures runs along the wall, showing human forms in and around boats. Below the paintings, archaeologists found wooden coffins carved into boat shapes, several still containing human remains and grave goods, generally dated to around 1,000 years ago. The paintings appear to show a journey of the dead by water. It is one of very few rock art sites anywhere in Borneo that can be connected directly to the burials lying underneath it. Sitting at 10, the city of millions that keeps losing its taps. Kuala Lumpur and the Klang Valley sit in one of the wettest countries on Earth, and they have repeatedly had their water supply shut off entirely. Not by drought, by pollution. Illegal dumping of chemical waste into the Sungai Selangor and its tributaries has forced treatment plants to shut down on multiple occasions, cutting supply to millions of households for days at a time, most severely in 2020, when tankers were sent out to residential streets. In a place with well over 2 meters of rain a year, the water problem is not scarcity at all. It's what somebody quietly poured into the river upstream. At number 9, the animal that was missing for 87 years. The Bornean rainbow toad, a long-limbed amphibian with green, purple, and orange markings, was last recorded in the 1920s by European explorers and known afterwards only from illustrations. Nobody had photographed a living one. In 2011, a team from University Malaysia Sarawak searching at night in the Penrisen Range finally found three of them, high in the trees, after months of searching in the dark. It had been on a list of the world's most wanted lost species. It had simply been sitting above people's heads in the canopy the entire time, out of reach of anyone looking at the ground. Number 8, the exodus that takes an hour to finish. Deer Cave in Gunung Mulu holds a colony of wrinkle-lipped bats numbering in the millions. Near dusk, they leave, and they don't leave as a cloud. They come out in a long, twisting ribbon, spiraling out of the mouth and stringing across the sky in coils that hold their shape for kilometers, and on a good evening, it takes well over an hour for the cave to empty. Bat hawks and snakes station themselves at the entrance and pick off the ones flying at the edges. The floor underneath is meters deep in guano, with its own ecosystem of insects and scavengers living inside it. Coming in at 7, the stone blades growing out of the jungle. On the flank of Gunung Api in Sarawak, rain has been dissolving limestone along vertical fractures for a very long time, and what it has left is the pinnacles, a forest of gray stone spikes up to 50 meters tall standing in rows above the canopy. They look manufactured. They look like something left behind by somebody, rather than something that grew. Getting to the viewpoint means a climb that is short in distance and close to vertical in practice, up ladders and fixed ropes, which is why most people who visit Mulu never see them in person at all. Landing at 6, the crater that Mae rewrite when people made tools here. At Bukit Bunu in the Lengong Valley, Perak, geologists have argued that the landscape preserves a meteorite impact structure, identified from shocked rock and suavite, a melt and fragment rock produced by impacts. And embedded in that impact material, researchers reported finding stone tools. If the dating holds, it would place toolmaking in this valley at around 1.83 million years ago, which is extraordinarily early for Southeast Asia. The claim is contested and has been argued over for years, which is exactly why it belongs on this list. The valley itself is a UNESCO World Heritage Site for its prehistoric record either way. Sitting at 5, the oldest rock in the country under a beach resort. Langkawi is sold as an island of duty-free shopping and hotel beaches. It is also built on the Machinchang Formation, sandstone laid down over 500 million years ago in the Cambrian, the oldest exposed rock in Malaysia, which is why it became the first UNESCO Global Geopark in Southeast Asia. People sunbathe on a seafloor that formed before anything with a backbone existed. The island also carries the legend of Masuri, a woman executed for adultery who is said to have cursed it for seven generations. Locals will tell you the 7th generation has now passed and point at the tourism as proof. Next up, 4, the biggest room on the planet, found by men who couldn't see the walls. In 1980, British cavers working in Gunung Mulu pushed through a passage and came out into open space. Their lamps did not reach the ceiling and did not reach the far side. They worked out the scale afterwards by pacing sections of the floor in the dark and adding it up. The Sarawak Chamber is roughly 600 meters long and 400 wide, the largest known cave chamber on Earth by floor area, large enough to hold dozens of jumbo jets. It sits under a mountain in total darkness and almost nobody has ever stood in it because getting there means a long, committed caving trip rather than a walk. At number 3, the civilization that was buried, forgotten, and then bulldozed. The Bujang Valley in Kedah holds the oldest known civilization site in Malaysia, a Hindu-Buddhist trading complex with dozens of kandi, temple structures, some dating back to around the 4th century and evidence of iron smelting and Indian Ocean trade going back further still. It sat under plantation and scrub for centuries. Then, in late 2013, a private developer demolished Kandi No. 11, a structure roughly 1,800 years old, with an excavator. There was national outrage and it came far too late to matter. The site remains only partly excavated and only partly protected, and archaeologists have argued for years that far more of it is still sitting under the plantations. Sitting at 2, the continent that is under the sea, between the two halves of the country. Look at a map and Malaysia is split by 400 miles of the South China Sea. That water is shockingly shallow, much of it under 60 meters. During the last ice age, with sea level roughly 120 meters lower, it was not sea at all. Peninsular Malaysia, Sumatra, Borneo, and Java formed one continuous plain and the drowned valleys they cut have since been mapped on the seabed. Rivers crossed it, and the drowned valleys they cut have since been mapped on the seabed. People walked it, which is why the same animals turn up on both sides. Then the ice melted, the sea came up, and it drowned, slowly enough for generations of people to watch the coastline move inland year after year. And the number one weirdest geographic mystery in Malaysia, the aircraft that is still missing. On 8 March 2014, Malaysia Airlines flight MH370 left Kuala Lumpur for Beijing with 239 people aboard. Less than an hour in, the transponder stopped. Military radar then tracked the aircraft turning back across the peninsula, flying over the Strait of Malacca and heading out past the northern tip of Sumatra. After that, the only trace was a series of automated hourly handshakes with a satellite, which gave investigators no position at all, only the angle between the aircraft and the satellite. From those arcs, analysts calculated that the plane most likely ended its flight in the southern Indian Ocean, a stretch of water thousands of kilometers from land that had never been properly surveyed. So they surveyed it. The search mapped more than 700,000 square kilometers of seabed in detail, revealing underwater volcanoes, ridges, and canyon systems that nobody knew were there, and producing the best map anyone has of that part of the planet. Confirmed debris from the aircraft has since washed up thousands of kilometers away on Réunion, Mozambique, Tanzania, and Madagascar, drifting on currents that broadly fit the theory. And the wreck itself has never been found. The largest and most expensive search in aviation history produced a spectacular map of an ocean floor, and the thing it was looking for was not on it. So that's 20 things Malaysia was hiding. A cave that collects turtles, a temple that got bulldozed after 18 centuries, and an aeroplane that vanished into water we had to map from scratch to look for it. But we know we missed some. Every state here has a back road with a story on it. So tell us in the comments, what's the strange thing near you? The haunted spot? The impossible place? The thing your town swears is true? The best ones go in the next video, and you pick where we go next. Option 1. Indonesia, the volcanoes, the lost hominins, and the islands nobody has surveyed. Option 2. The Philippines, the trenches, the typhoons, and the caves full of coffins. Option 3. Borneo on its own, the interior, the rivers, and everything still unmapped in the middle of it. Drop your number below. Highest vote wins. Subscribe if you made it this far, and see you in the next one.