Qinghai · Unique landscapes

Dachaidan Emerald Lake大柴旦翡翠湖 · Dàcháidàn Fěicuì Hú

A former borax and salt working at 3,100 m whose evaporation ponds turned into dozens of impossibly turquoise pools — 'emerald lake' undersells the range, from mint to deep teal, set against Qaidam desert and snow ridges. It has become the photogenic secret of the Qinghai big-loop route to Dunhuang.

Emerald Water Lakes, Dachaidan Emerald Lake

Why go

Industrial accident, promoted to natural wonder.

Nobody designed Emerald Lake: decades of borax and salt extraction at Da Qaidam left evaporation ponds that mineral chemistry slowly turned into several dozen pools of impossible color — mint, turquoise, teal, milk-jade — set in white salt crusts against the bare ranges of the Qaidam basin. At 3,100 m under Qinghai's violent-blue sky, the palette doesn't look real from ten meters away.

It has become the connoisseur's stop on the Qinghai 'big loop' — the road trip from Xining past Chaka Salt Lake and on to Dunhuang — and the trick is timing: dawn, before the wind, when every pool is a mirror and the tour buses are still hours away. Give it a half day and you'll have the strangest landscape photos of the trip.

LocationQinghai, China · 37.9° N, 95.28° E

Getting thereDa Qaidam (Dachaidan) town, on the Qinghai 'big loop' road route — most travelers arrive by car from Xining (a long day) or en route between Chaka Salt Lake and Dunhuang

From the hubAbout 15-20 minutes by car from Da Qaidam town; boardwalks and tracks loop the pools

Time neededHalf a day; sunrise or late afternoon for still water and saturated color

Entry & permitsSmall entry fee (verify); the site has moved between free and ticketed as it develops · Permits: None

Altitude3,100 m — see acclimatization notes below

Signature experiences

What this place is for.

Arrive for first light, when the pools are wind-still mirrors and tour traffic hasn't started
Walk the full boardwalk circuit — every pool holds a different color depending on depth and mineral load
Shoot reflections of the Qaidam ranges in the salt-crusted shallows
Fold it into the classic loop: Chaka Salt Lake behind you, the Yadan 'ghost city' and Dunhuang ahead

When to go

Timing is most of the trip.

May-October, in the morning calm before wind ripples the pools — the turquoise reads deepest under strong high-altitude sun. Winter access is possible but bitter, with some pools frozen or drained.

Local culture

The Qaidam basin is Qinghai's mining and salt country — the lake is literally industrial archaeology turned landscape, and Da Qaidam town remains a working supply stop on the route west.

Practical notes

For foreign travelers.

This is road-trip country: hire a car and driver in Xining or join a small-group loop — there's no practical public-transport option.
It sits at 3,100 m: arrive rested, drink water, and expect the sun to be far stronger than the temperature suggests.
Do not wade into the pools — the brine and crusts are protected, and staff enforce the boardwalks.
Fuel, food, and lodging cluster in Da Qaidam town; book ahead in July-August when the loop route peaks.

Before you decide

Questions travelers actually ask.

Emerald Lake or Chaka Salt Lake — which is better?

Different tricks: Chaka is one vast white mirror-flat that made 'sky mirror' famous — and is heavily developed and crowded. Emerald Lake is dozens of smaller pools in different colors, less built-up, and better at dawn. On the standard loop you pass both; if forced to choose, photographers now tend to pick Emerald Lake.

How do I visit without a tour?

There's no practical public transport — hire a car and driver in Xining (standard for the loop) or self-drive. Da Qaidam town, 15-20 minutes away, has fuel, food, and simple hotels; overnighting there is what makes the dawn visit possible. Entry is a small fee (verify) with boardwalk circuits.

Is the altitude a problem?

At 3,100 m most people feel it mildly — headachy first nights, breathlessness on stairs — but the visit itself is flat, short walking. Arrive rested, hydrate, and treat it as one of the loop's gentler acclimatization stops before higher passes elsewhere on the route.

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