Taksim is an underground rapid transit complex. It is located in central Beyoğlu under Taksim Square in Istanbul. The complex is serviced by the M2 line of the Istanbul Metro and the Kabataş-Taksim Funicular (F1) line. Taksim was opened on 16 September 2000 as the southern terminus of the M2 until the line was extended to Yenikapı in 2014. On 29 June 2006 the Kabataş-Taksim funicular station was opened, offering shuttle service to Kabataş. Taksim is the busiest station on the M2 Line as well as the Istanbul Metro. Connections to Havabüs express bus service to Sabiha Gökçen Airport are available.