This station is one of the most important metro terminals in the city. It serves Mexico City's western bus depot, which connects with areas of western Mexico such as México state, Michoacán, Jalisco, Querétaro and others. The Observatorio Mexico City Metro station is the 1st station of Line 1 and the Mexico City Metro system. Service at this station began June 10, 1971. This Mexico City Metro train station is underground. The trains take passengers to Tacubaya, Juanacatlán, Chapultepec, Sevilla, Insurgentes, Cuáuhtemoc, Balderas, Salto del Agua, Isabel la Catolica, Pino Suárez, Merced, Candelaria, San Lazaro, Moctezuma, Balbuena, Boulevard Puerto Aéreo, Gómez Farías, Zaragoza, and Pantitlán Mexico City Metro stations. Originally line 9 had its plans to end here, even pictograms in line 1 showed this station as a transfer station for line 9. But for an unknown reason the station wasn't built and the line 9 finished at Tacubaya.