Its main building is located in Ave. 25 de Mayo 11 (with a backdoor access through Ave. Leandro N. Alem 10), at the heart of Downtown Buenos Aires, near to the Presidential Palace and Plaza de Mayo. Although the central base is the 25 de Mayo building and annexes, many buildings, known as bases or operation centers, are spread throughout the city of Buenos Aires. There are reports that the main building is also connected to the Casa Rosada, which is across the street, through an underground passage.