A series of photos featuring the city of Chongqing recently went viral online as netizens were wowed by the city's layout with houses built on and below the roadway in what they called a "multi-layer labyrinth."

As a mountainous city, Chongqing is built on the transitional area between the Qinghai-Tibet Plateau and the plains on the middle and lower reaches of the Yangtze River. Situated on rolling hills flanked by rivers, the municipality has become a megacity and a transportation hub in southwestern China. Among the little laneways, countless skyscrapers rise above the ground, making the city an inland version of Hong Kong.

Here's how netizens teased the unbelievable geographical layout of the city.

"If you stay in a room on the 10th floor in Chongqing and suddenly see a figure flash past the window, don't panic; it's neither a ghost nor Spiderman, it's just a passer-by," teased a netizen on Sina Weibo, China's twitter-like micro-blogging site. [Photo / Wechat]