Read anything about Ketti and you will meet the same sentence. This is the second largest valley in the world. Or the largest valley in Asia. Or one of the largest gorges on earth. It is on tour operators’ pages, in newspaper travel columns, on signboards, and it has been copied into so many places that it now reads as common knowledge.
We went looking for the measurement. There is not one.
Why a claim that contradicts itself is not a claim
The first problem is that the versions do not agree with each other. Second largest in the world and largest in Asia are different statements, and both are different again from one of the largest gorges on earth. A figure that has actually been measured tends to survive retelling, because the number anchors it. A figure that has only ever been repeated drifts, and this one has drifted a long way.
The second problem is that nobody says largest by what. Valleys are not ranked on any standard register. You could mean length, or the area of the catchment, or depth from rim to floor, or the volume of rock that is missing. None of those measurements is published for Ketti by any survey, government department or geographer we could find, and without one the superlative is not a fact that happens to be unverified — it is a sentence with no measurable content in it at all.
So we have taken it off our Ketti page rather than pass it on. If a reader can point us to an actual measurement from a source that made it, we will print the number and say who measured it.
What the valley demonstrably is
It is a wide, deep, thoroughly inhabited valley on the Ooty–Coonoor road, and it does not need a record to be worth stopping for. Around twenty-four and a half thousand people lived in the village at the 2001 census. The floor and both slopes are farmed — carrot, cabbage and potato in terraces cut into red earth, tea on the steeper ground, polytunnels for flowers — and the hamlets are strung along it in the Badaga pattern of hattis. A World Heritage railway runs through the middle. A needle factory, of all things, is the largest industrial employer.
The record it does hold
And here is the thing that is odd about the superlative: the valley holds a genuine record, and nobody puts it on a board. On 8 November 2009, as the system that became Cyclone Phyan crossed, Ketti recorded 82 centimetres of rain in twenty-four hours — beating the previous twenty-four-hour rainfall record for the whole of Tamil Nadu.
Eight hundred and twenty millimetres. In one day. On a hillside of terraced red earth and cut slopes above a road. That is a documented, dated, attributable fact about this valley, and it is more remarkable than any unsourceable ranking of the world’s valleys. It is also practical information: if you are planning a visit during the north-east monsoon, from October into December, this is the kind of rain this place is capable of.
A note on how we check things
We are not singling Ketti out. A great deal of Indian travel copy runs on superlatives that were never measured, and they spread because they are pleasant and nobody has an incentive to check them. Our rule is simple: if we cannot find who measured a claim, we do not print it, and we say that we could not. A valley with twenty-four thousand people farming it, a mountain railway and the state rainfall record does not need to be ranked against the Grand Canyon to deserve an afternoon.