The cold spell caused local temperatures to drop to below 1 degree Celsius on December 30.
Dense fog and drizzle made travel very difficult, especially in the resort town of Sapa.
Despite the freezing cold, many tourists prefer travelling and watching the intriguing natural phenomenon.
The cold spell is forecast to last a few days.
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| On O Quy Ho Hill at the border of Lai Chau and Lao Cai provinces |
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| At an altitude of 2000m above sea level, the temperature is less than 1 degree Celsius and trees are covered with frost |
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| The crystallized winter wonderland attracts many tourists during the holiday season |
