Gawping crowds caught the bizarre natural phenomenon on camera, and watched in awe as towering skyscrapers seemed to appear in the clouds.
The ghost-like buildings dominated the skies for minutes on Friday in Dalian, China.
The stunning footage shows the spooky structures appear in smog above a lake.
EERIE: Locals thought a ghost city had emerged in front of their eyes
But weather experts said what happened can be explained by an optical illusion called Fata Morgana.
Pictures that will make you believe in ghosts
Monday, 11th January 2016
Ghosts are among the most widely believed of paranormal phenomena. Are these the pictures that confirm ghosts really do exist?
It can be seen on land or sea and involves the distortion and inversion of distant objects, such as boats.
In October, thousands were shocked in China after a mysterious “cloud city” was spotted in the clouds.
STRANGE: The ‘ghost city’ follows the ‘cloud city’ phenomenon in China last year
WOWED: Residents were left stunned on Friday
Conspiracy theorists suggested that otherworldly happening in Foshan, south China, might have been part of the Blue Beam Project by NASA to dupe the world into following a new religion.
This would happen by fooling the world into believing an alien invasion is underway, making people give up their gods and accept the new faith.
And last year, when a giant “nuclear” cloud was spotted looming over Tyumen in central Russia, residents thought World War 3 had kicked off.
HAUNTED: Several spooky buildings appear in the smog
Spectacular photos of the huge mushroom cloud quickly went viral and panicked Russians.
They took to social media in fear.