The Netherlands is a geographically lowlying country, with about 25% of its area and 21% of its population located below sea level, and 50% of its land lying less than one metre .
Amsterdam decided to construct it in 1968. Four lines were built, connecting the entire city. The expectation was that the metro would be finished in a century.
There are four lines ( one in construction) and 52 stations.
Gaasperplaslijn is the red line from Gaasperplas to Centraal StationRinglijn is the green line from Isolatorweg to Gein.Amstelveenlijn is the orange line from Westwijk to Centraal StationNoord/Zuidlijn is the blue line from Station Zuid to BuikslotermeerpleinGeinlijn is the yellow line from Gein to Centraal Station