Satellite maps have made it nearly difficult to locate a certain type of stillness. Open any mapping application on your phone, zoom into the most remote corner of Siberia, the deepest reach of the Congo Basin, the high plateau of Tibet, and you will find a rendered image waiting for you — contour lines, river tributaries, elevation data, sometimes even the shadow of a cloud caught mid-pass by a low-orbit sensor.
Photographs of the planet have made it familiar. Nevertheless, there are locations on Earth where no human foot has set foot, no hand has touched a rock, and no eye has taken in the vista from the ground. This is the part that still manages to surprise me. The argument begins with the question of what to do about that, and it is difficult to settle.
| Concept | The last undiscovered places on Earth — a shrinking category in the age of satellite mapping, raising urgent questions about exploration ethics |
|---|---|
| Gangkhar Puensum, Bhutan | At 7,570 metres, the highest unclimbed mountain in the world — climbing banned by the Bhutanese government out of spiritual and environmental respect |
| Vale do Javari, Brazil | Roughly the size of Austria, deep in the Amazon — home to at least 14 uncontacted tribes, intentionally left unexplored to protect its inhabitants |
| The Deep Ocean Floor | 95% of the ocean floor has never been mapped or explored — despite covering 70% of the planet’s surface |
| Antarctica’s Subglacial Lakes | Lake Vostok and similar formations sealed beneath miles of ice for millions of years — largely untouched and poorly understood |
| Son Doong Cave, Vietnam | The world’s largest known cave — most of its interior remains unmapped; access strictly controlled and limited to small permitted groups |
| The Core Debate | Preservation versus exploration — environmental degradation, disease risk to uncontacted peoples, scientific value, and the ethics of “last-chance tourism” |
| Emerging Alternative | Undertourism — directing travellers to under-visited but not pristine places, managed for low ecological impact |
| Mt. Kailash, Tibet | Sacred to four religions — never climbed, not merely because of difficulty but because the prohibition is considered non-negotiable by those who regard it as holy |
At 7,570 meters, Gangkhar Puensum in Bhutan is the world’s highest unclimbed peak by a significant enough margin that no mountaineer is likely to unintentionally surpass it. The Bhutanese government banned climbing above 6,000 metres in 1994, citing a mix of spiritual concern — the peaks are considered the dwelling places of protective deities — and practical recognition that high-altitude rescue operations in remote terrain carry costs and risks that fall on people other than the climbers themselves.
There is the mountain. It’s been there all along. It will continue to sit there for as long as the ban holds, and the summit will remain untouched in a way that no other peak of comparable scale anywhere on Earth can claim. That is truly remarkable—a record that is solely characterized by absence.
Brazil’s Vale of Javari offers an alternative kind of unspoiled. Deep in the western Amazon, covering an area roughly the size of Austria, this region holds at least fourteen groups of people who have had no sustained contact with the outside world — the largest concentration of uncontacted tribes on the planet. The Brazilian government’s Indigenous affairs agency, FUNAI, maintains a strict protection zone around the area, not as a tourism strategy or a conservation gesture, but as a matter of straightforward survival.
In the past, interactions between a group that has never been exposed to common infectious diseases and outsiders have had disastrous results. Repeated catastrophes occurred throughout the Amazon in the 1970s and 1980s when contact—no matter how well-meaning—introduced diseases to which remote populations lacked any immunity. Here, keeping people out is not a sign of paternalism. It is the most fundamental type of defense.
The numbers become nearly impossible to remember below the ocean’s surface. Even though the ocean spans 70% of the world, only about 95% of the ocean floor has ever been mapped at a resolution that is suitable for scientific understanding. Mars’ surface has been documented more thoroughly than the seafloor in the deepest trenches, such as the Mariana, Tonga, and Philippine.
Lakes like Vostok beneath Antarctica’s ice sheet have been walled off from the environment and everything in it for between fifteen and thirty-four million years. Since the process of reaching these ecosystems may irreparably alter them before they are fully understood, drilling into them is a scientific aim with its own set of ethical and pollution problems.
The case for abandoning these locations is made in multiple registers at once. Degradation of the environment caused by “last-chance tourism”—the phenomena of people rushing to see locations because they are disappearing—has been sufficiently documented to have its own body of literature. The very changes that make a place worth visiting can be accelerated by carbon emissions from long-haul flights alone.
Where there is no infrastructure to handle it, physical waste builds up. In Son Doong Cave in Vietnam, where the caverns are so large that clouds form inside them, access has been tightly restricted to small permitted groups in part because the cave’s extraordinary ecosystem is genuinely fragile in ways that aren’t immediately obvious to someone walking through it on a torch-lit tour.
Even if the counterargument is occasionally employed frivolously, it is not frivolous. Unmapped cave systems, ocean trenches, and subglacial lakes have all yielded scientific discoveries that would not have been possible without someone choosing to go and investigate. These discoveries include new species, new geological information, and new insights into the history of the climate.
In certain instances, responsible ecotourism—that is, ecotourism that is actually managed rather than just promoted as such—has produced conservation money that shielded regions from more damaging extraction sectors. The claim that learning about our world is intrinsically valuable is not a justification. It has a valid history and is a long-standing custom.
What’s emerging from the edges of both camps is something more pragmatic — undertourism, the deliberate redirecting of traveller attention toward places that are under-visited without being untouched, where tourism infrastructure exists but hasn’t been overwhelmed, where the economic benefit of visitors actually reaches local communities rather than evaporating into airline and hotel margins.
It probably gets less attention because it’s not as spectacular a concept as either full preservation or unrestricted exploration. It’s worth debating the last genuinely unexplored locations on Earth. For places that still stand to lose, however, the argument itself might be most important.
