Fort San Cristóbal, Military fortress in Berrioplano, Spain.
The Fort San Cristóbal spans multiple underground levels with stone walls, bastions, and extensive galleries within the mountain near Pamplona.
The fortress transformed from a military installation in 1892 into a prison during the Spanish Civil War, where 795 prisoners attempted escape in 1938.
The site includes a memorial monument dedicated to prisoners who lost their lives during the fort's operation as a detention center until 1945.
The fortress remains partially closed to visitors, though guided tours through specific sections occur during scheduled events throughout the year.
The underground network contains numerous tunnels and chambers that stretch deep into the mountain, creating an extensive subterranean complex.
Location: Berrioplano/Berriobeiti
GPS coordinates: 42.85665,-1.66586
Latest update: March 7, 2025 07:01
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