A light railway track has been built to go through a hole in a residential 19-storey building in China
The city of Chongqing in the south-east of the country has a population of 49 million packed into 31,000 square miles, causing urban planners to look creatively at solving space issues.
A special railway station was built into the block of houses, set into the sixth to eighth floors.
Residents can hop on Chongqing Rail Transit No.2 at their own Liziba station.
Even though they are living in close quarters to a busy train station, any noise has been muffled by special equipment.
To homeowners in the complex, the sound of the train is designed to be as disturbing as the noise from a dishwasher.