A landscape made by microbes
The Baishuitai, or White Water Terraces, sprawl across three square kilometers at an elevation of 2,380 meters. This geological formation consists of a series of cascading travertine pools that descend 140 meters down a mountainside at the foot of the Haba Snow Mountain. The structure is one of the largest travertine terraces in China. Its formation began between 200,000 and 300,000 years ago and continues to grow today.
The process is a combination of chemistry and biology. Spring water, emerging from the mountain, is saturated with calcium bicarbonate. As this water flows over the terraces, it releases carbon dioxide into the atmosphere. This chemical shift causes the dissolved minerals to precipitate out of the solution as solid calcium carbonate, the primary component of travertine and limestone.
This deposition is not a inorganic process. The hook for this location is the active role of microorganisms. Photosynthetic cyanobacteria and algae living in the shallow water significantly influence the water's chemistry. Their metabolic activities create localized conditions that accelerate the precipitation of calcium carbonate. The extracellular substances secreted by these bacteria also provide surfaces for mineral crystals to nucleate and grow. This microbe-driven process, known as biomineralization, is directly responsible for building the physical structure of the terraces. The colors seen across the pools—from milky white to yellow and green—are created by varying communities of these microscopic architects.
The cradle of Dongba culture
Baishuitai is a holy site for the Naxi people and the birthplace of their indigenous Dongba religion. According to legend, the founder of the Dongba faith, Dongba Shilo, meditated in a nearby cave and established the core tenets of the religion here. This belief system is animistic, holding that natural objects like mountains, rivers, and stones possess holy spirits that should be worshiped.
This cultural connection makes the terraces a pilgrimage site. A true Dongba master is expected to visit Baishuitai. An important festival occurs annually on the eighth day of the second lunar month, where Naxi people gather to worship their gods and celebrate their cultural origins. The shape of the terraces themselves is part of Naxi folklore; one legend states that a Naxi god created the landscape to show the local people how to build terraced fields for farming. A specific rock formation is also worshiped as a fertility god. The name given to the site in the Naxi language is "Shibuzhi," which means "growing gradually," a direct observation of the geological processes at work.