Federal Social Readaptation Center No. 1, Maximum security prison in Almoloya de Juárez, Mexico.
Federal Social Readaptation Center No. 1 is a maximum-security detention facility in the State of Mexico, southwest of Mexico City. The compound features reinforced perimeter walls, observation towers, and a multilayered security layout with cells monitored around the clock.
The facility opened in 1991 in response to growing security demands within the country's prison system. It has since served as the primary site for high-level offenders and underwent structural expansions following several escape attempts in later years.
Locals refer to the facility as "Altiplano," a name taken from the high plateau where it sits. The name has become widely known in Mexico due to the detention of several high-profile figures over the years.
The detention center stands west of Toluca on a remote plateau with limited public access. Visits are tightly regulated and require advance clearance as well as security screening upon arrival.
An underground tunnel system was discovered after a major escape in 2015, leading to extensive ground and perimeter checks. Seismic sensors have been deployed since then to detect any digging activity in the surrounding area.
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