  opÃ©ra is a station of the paris mÃ©tro, named after the nearby opera garnier, built by the architect charles garnier. it is located at the end of the avenue de l'opera, one of the accesses being opposite the opera, and serves the district of the boulevard haussmann. three mÃ©tro lines (3, 7 and 8) cross each other at one point, known as a "well". the station offers a connection to auber rer station and indirectly with the havre-caumartin mÃ©tro station, however, ongoing construction work has limited the access metro users have to it. the station is famous for its strong odors of sewers. when it was being built, there were concerns that one of hector guimard's characteristic iron metro entrances would spoil the view of the opera house, so a marble entrance was built instead. ==history==  the line 3 platforms opened on 19 october 1904 as part of the first section of the line opened between pÃ¨re lachaise and villiers. a twenty metre high masonry well was built to avoid the need for heavy underpinning work when lines 7 and 8 were planned to be built. this work was affected by groundwater, which required the support of three concrete pillars, made by sinking caissons with workers digging out the mud with compressed air. the work lasted eleven months, from march 1903 to february 1904. the line 7 platforms opened on 5 november 1910 as part of th
Paris_MA(c)tro_line_3 Paris_MA(c)tro_line_7 Paris_MA(c)tro_line_8 Paris_MA(c)tro_stations_in_the_9th_arrondissement_of_Paris Railway_stations_opened_in_1904