Guadarrama Tunnel

The Guadarrama Tunnel is a railway tunnel across the Sierra de Guadarrama, forming a key portion of the Madrid–León high-speed rail line in Spain. It is the largest tunnel in Spain, as well as being the fifth largest in the world at the time of its completion.

Guadarrama Tunnel

The Guadarrama Tunnel is a railway tunnel across the Sierra de Guadarrama, forming a key portion of the Madrid–León high-speed rail line in Spain. It is the largest tunnel in Spain, as well as being the fifth largest in the world at the time of its completion.