Tua Chua Karst Plateau

At about 1,500 meters above the sea, the ground turns into a field of blades. The limestone rises in gray points, bare and sharp, and between them lie small pockets of soil where people grow corn, pressing the seeds into one crack after another. This is the Tủa Chùa limestone plateau, in Điện Biên Province.

The land did not come to look like this by chance. Geological studies of the northwestern karst explain why. The limestone of the Tủa Chùa area dates from the Cambrian to the Triassic periods, roughly 500 to 250 million years ago. It is rich in calcium oxide, which makes it well suited to a process called karstification. Slightly acidic rain, falling over ages, slowly dissolves and wears away the limestone. Over time it carves the shapes that mark karst country: sharp peaks, sheer walls, deep hollows and hidden caves underground. The pointed rocks on this plateau are called đá tai mèo, which means cat's ear rock. They are the result of hundreds of millions of years of that slow work.

The plateau spreads across several communes. Two of them are Tả Phìn and Sín Chải. Two more are Lao Xả Phình and Tả Sìn Thàng. The roads into this country wind through steep climbs and deep drops, and every bend opens onto a gray sea of stone that runs to the edge of the sky.

The Vietnam News Agency mentions a few local names for this stone country. Tò Cu Nhe is one of them. Chung Khóa and Chung Si Seng are two more. Thành Vàng Lồng is a fourth, the name of an area. These are the names used by local people and in the press, not official geographic or administrative names.

Among these names, Thành Vàng Lồng is the one with official heritage status. A report from Sính Phình commune describes it as a provincial site of architecture and art. The Điện Biên People's Committee ranked it under Decision 295, signed on June 6, 2014. The site lies in Tả Phìn 1 village. After the administrative merger, the village now belongs to Sính Phình commune. The site is a mark of the history and culture of the Hmong people on this limestone land, and its stacked slabs of stone still show the work of human hands long ago.

What draws people to the Tủa Chùa plateau is not only the scenery. It is also a story about people. The same agency describes Hmong families sowing corn in the small strips of earth between the rocks. On land where almost no farmland exists, they still find a way to live and plant. Every small hollow in the stone is a precious piece of soil. It takes a patience and an ingenuity that no textbook can teach.

The plateau is still wild, a wide landscape spread over many communes and not yet built up into an organized tourist area. That wildness is part of its beauty. Nothing stands between you and the sea of stone, only wind, cloud and silver-gray cat's ear rocks running on to the horizon.

Here time is measured in millions of years, and people still find a way to take root in every crack of the rock.