metropolitan railway underground metro world fair exposition universelle 1900 paris france catacombs 19th century construction constructions industry infrastructure people person persons pipe pipes rapid transit public transport urban area tram system tunnel services rail tracks trains quickly met subway 1872 entury aged and architecture railroad railroads railway railways station stations stop stopping stops town towns traffic train tube drive being beings modern passenger passengers transportation way ways exhibition capital culture 20th century exposition universelle french world's fair cultural world fair international exhibitions 19th century technology industrial international exhibition drawings drawing historical historic history depictions depiction incidental old prestigious sketch great of the works all nations u-bahn untergrundbahn - Alamy