When bike share programs go right, they can make life easier for commuters while reducing a city’s impact on the environment at the same time. When they don't go exactly as planned, they can create sprawling bicycle graveyards like the one seen in these photos.

The eerie scenes, recently spotlighted by WIRED, can be found throughout the city of Hangzhou, China. Like many large cities, Hangzhou is home to an official bike share program. But there are also private bike share companies that give cyclists the option to pick up a bike and leave it wherever they please rather than return it to an official docking station. The result is thousands of bikes scattered around the city like junk.

In response to complaints, the city of Hangzhou has begun collecting these abandoned bikes and storing them in lots. These aerial images are a good indication of the sheer number of bikers the city has—and they also have a creepy, post-apocalyptic vibe. Check out the photos below.

STR/AFP/Getty Images

STR/AFP/Getty Images

STR/AFP/Getty Images

[h/t WIRED]