Night view of a densely populated residential district in China.
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THE WORLD’S most unique city leaves visitors never knowing which floor they’re on, and has trains running through buildings.

Chongqing, located in China, has garnered a reputation as a “planning and engineering aberration”, due to the fact that the ground floor of one building might be the 20th floor of another.

Night view of a densely populated residential district in China.
In Chongqing, the entrance to buildings can be on the 1st, 5th or 20th floor
High-angle view of city buildings from a 22nd-floor vantage point.
Skyscrapers are connected to each other via bridgesCredit: TikTok/@hughchongqing
Train passing over street-level buildings.
A train runs through buildings

“In Chongqing, the ground floor could be on the 1st, 5th, or 10th floor, depending on which side you enter from” one local said.

Referred to as a “planning laboratory”, the city has developed uniquely because it is nestled among steep hills, cliffs, and river valleys, where the elevation can suddenly shift by hundreds of meters.

This topography means that buildings in Chongqing, which is approximately the size of Austria, often feature entrances on multiple different floors, dictated by the levels at which surrounding roads have been constructed.

Unlike a regular city, where things are built horizontally, roads, transport networks, and pedestrian walkways are all built on top of each other, a bit like a lasagne.

Skyscrapers are often connected to each other using bridges and even rooftop parks, with schools and cultural centres built on upper levels of the city.

Attempting to explain the complexities of the city, which is home to 32 million people, Hugh (@hughchongqing), a resident who offers tours of the city took to Tiktok to give viewers a virtual tour.

“In Chongqing, we never know which floor we’re on”, he said in a video that has racked up over 27 million views.

Starting off in one of the city’s squares, Hugh explained that although it looks like just a ‘normal square’ on ground level, if you walk across the square you end up on a bridge 22 floors up.

However, if you use the lift located on the square, it says you are on the 12th floor.

Hugh took the lift down to the eighth floor, and ended up back on ground level.

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The tour guide then entered the building next door, where a sign on the lift told him he was on the 13th floor.

He exited the building from the 13th floor, went in to the building next to it, crossed over a bridge which was suspended high in the air, and then, on the other side of the bridge, ended up back at street level.

Hugh then went in to the next building along, took the lift to the fourth floor, and ended up back on street level again.

The tour guide then showed footage of a train running straight through a building, suspended high in the air.

Finally, he went into another building, took the floor to the 22nd floor, and ended up back on the square again.

Hugh’s video has likely left many people open-mouthed, as it has racked up over 3.2 million likes, and over 20 thousand comments.

TikTokers raced to the video’s comments section, to share their disbelief at the remarkable city.

One person said: “How is this possible?”

A second person said: “How does navigation work there?”

A third added: “Imagine how hard it is to go by Google maps there!”

Person standing in front of an elevator, the display shows the 12th floor.
Residents never know what floor they’re on in the unique cityCredit: TikTok/@hughchongqing
Person walking across a bridge in a city.
The city is like a mazeCredit: TikTok/@hughchongqing
Night view of Hongyadong, Chongqing, China, illuminated hillside buildings and bridge with traffic.
Buildings are built on top of each otherCredit: Getty
Hongyadong, Chongqing cityscape with modern skyscrapers and traditional buildings.
The layout of the city has been likened to a lasangeCredit: Getty
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