Determine the distance

Map of the world metro.
You can choose a city in the search form or in the list, the zoom will not work.

This is an open map and is created by the whole world. Therefore, not everything is noted, for example, the Metro of Moscow is there, but it is empty. Probably because we have enough good Moscow metro cards, so it is not in demand.

Filters allow you to disable subway lines.
It is possible on a time scale to examine how the metro looked like, how it developed.