Castillo de San Marcos, Medieval fortress in Sanlúcar de Guadiana, Spain.
The Castle of San Marcos stands atop a hill, featuring thick circular towers and walls that overlook the Guadiana River and Portuguese territory.
The initial fortress was constructed by Portuguese forces in 1239, later becoming part of the Kingdom of Castile during the Algarve border definition.
The fortress serves as a vital monument of Spanish military architecture and maintains its status as a protected cultural heritage site.
Visitors can access the castle through a steep path from the village center, with opening hours from 10:00 to 18:00 throughout the year.
The castle directly faces its Portuguese counterpart, the Castle of Alcoutim, creating a historical military dialogue across the Guadiana River.
Location: Sanlúcar de Guadiana
GPS coordinates: 37.47581,-7.46326
Latest update: March 15, 2025 21:21
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