The Wuppertal metro is located in Germany. This is not really considered a meter, but rather as part of the country's rail system.
It was opened to the public on 1 March 1901, currently 20 Tube stations along 13,3 Km (8,3 miles), which is to have on average each station 665 meters (727,3 yards).
Click on the following maps Metro, to see larger images:
Links: