About Angel Eye Mountain
Angel Eye Mountain (Nui Mat Than) is a distinctive karst mountain in Quoc Toan Commune, Tra Linh District, Cao Bang Province, within the UNESCO Non Nuoc Cao Bang Geopark. It is notable for a large circular hole about 50 meters in diameter piercing the summit, resembling an eye. Surrounded by a grassy valley and seasonal lakes, the mountain is a prominent natural landmark and photography site in northeastern Vietnam.
Visitors guide
Visitors can expect a large isolated limestone mountain with a natural circular tunnel through its upper section, set in a wide grassy valley surrounded by karst peaks. The valley floor is covered with grass and seasonal lakes that appear in the rainy season and dry in winter. Visitors can walk across the open meadow, view the mountain from various angles, photograph the eye-like hole, and see grazing cattle and horses. There are no built structures on the mountain itself; the area is natural and open.
Key highlights
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Natural circular hole approximately 50 meters in diameter through the mountain summit
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Located within UNESCO Non Nuoc Cao Bang Geopark
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Wide grassland valley with seasonal lakes at the mountain base
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Panoramic karst landscape with surrounding limestone peaks
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Popular photography and sightseeing spot in Quoc Toan Commune
History of Angel Eye Mountain
The mountain is a karst formation within the Non Nuoc Cao Bang Geopark, formed by long-term limestone karst processes. The site is recognized for its geological value as part of the UNESCO Global Geopark network.
Culture & Context
Known locally as Phja Piot in the Tay language, the mountain is associated with local Tay ethnic communities who graze livestock in the surrounding valley and is a culturally recognized natural landmark of Cao Bang.
Route
| By road | Approximately 45-50 km southeast of Cao Bang City via National Road 3 and provincial roads to Quoc Toan Commune, then by motorbike or car on rural roads to the valley; final approach on foot across the meadow |
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