Príncipe Pío (Madrid Metro) Príncipe Pío (Madrid Metro) Príncipe Pío (formerly Estación del Norte) is a multimodal station in Madrid, Spain that services Madrid Metro Line 6, Line 10, and Ramal, Cercanías Madrid commuter rail lines C-1, C-7, and C-10, as well as city buses and intercity and long-distance coaches. It is located next to the River Manzanares between the San Vicente roundabout, the Cuesta de San Vicente, the Paseo de la Florida, and the Paseo del Rey in the district of Moncloa-Aravaca. It is one of the busiest stations in the Madrid Metro and Cercanías systems. Príncipe Pío's train station has three levels.
Allison Engine Testing Stands section. The most prominent features of the six open engine testing stands constructed in 1942 are the six reinforced concrete walls which separated the testing stands and provided a degree of protection against excessive noise or a propeller malfunction. Stands 1 to 4, numbered from the north, have been constructed on a raised concrete platform above ground level. Parts of its flooring have been raised higher above the general level of the platform. They indicate the positions where each engine stand and its respective control cabin would have stood. Most of the remaining evidence of the purpose and working life