People in southern China were surprised to see a floating city in the sky last week.
Residents of the city of Yueyang in Hunan Province shared footage of the bizarre scenes which showed towering buildings appearing from the clouds near a lake.
Many believed that they had witnessed a rare optical illusion known as a mirage, or a Fata Morgana, however experts explained that the phenomenon in Hunan had been caused by radiation fog.
Real or illusion? Residents in China were surprised to see buildings appearing from the clouds
The phenomenon occurred in the afternoon of January 14 by Qianmu Lake in Yueyang, reported China's state-owned Xinhua News Agency.
A video was taken by the tourists and residents who were by the Lake at the time. The footage shows a blurry image of around four high-rises floating above the clouds in distance.
People can be heard yelling excitedly in the background 'look, it's a mirage' and 'quick, let's film this'.
The video was later shared on Chinese social media platforms, such as Weibo, with many baffled by the unusual and mysterious sight.
However, meteorological experts said the phenomenon was not a mirage.
Li Dongyang, the deputy director of Yueyang Meteorological Bureau, told Xinhua that the buildings were real, and they had been covered by radiation fog.
Not a mirage: Experts explained that the