Pontón de la Oliva, Industrial dam near Patones, Spain
The Pontón de la Oliva spans 70 meters in length and reaches 27 meters in height, featuring limestone walls across the Lozoya River.
Construction of the dam began in 1856 with 2000 workers, many of whom were prisoners, marking Madrid's first major water supply infrastructure project.
The dam structure contains marine fossils within its stones, reflecting the geological history of the region when it was submerged underwater millions of years ago.
Visitors can access the dam wall and explore hiking trails around the site, with parking facilities available near the M-134 road entrance.
The dam experienced significant water filtration issues due to its permeable limestone base, leading to its abandonment after 30 years of operation.
Location: Patones
Location: Valdepeñas de la Sierra
GPS coordinates: 40.88444,-3.44056
Latest update: May 13, 2025 11:42
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