Where is it? The Netherlands, of Course.
At the Groningen rail station in the Netherlands there are enough parking spaces for 10,000 bikes even though the population is only 188,000. Bikes are stacked on top of each other and, as you'll see, there's still barely enough room. We can dream.
Watch the Video — You learn a lot about bike parking and the strength of Dutch Seniors.
There's another more modern bicycle garage nearby, with another 4000 spaces. Amazing technology.