Fort 4, Military fortress in Mortsel, Belgium
Fort 4 is a military fortification near Antwerp featuring underground tunnels, reinforced concrete buildings, and observation posts positioned for defense. The structure displays early 20th century construction techniques and retains visible evidence of its role in the defensive perimeter.
The fortification was built in the late 1800s as part of Antwerp's defensive system. It was heavily bombed in October 1914 and abandoned by Belgian forces, then suffered additional damage from aerial attacks decades later.
The fort now functions as a memorial site with panels and stones commemorating the citizens who lost their lives during the Second World War.
The fort is located in a residential area and is accessible by public transportation. Visitors should wear appropriate footwear for uneven terrain and expect both indoor and outdoor exploration.
The structure sustained direct hits from aerial bombs after Antwerp's liberation yet remained structurally sound due to its reinforced concrete design. This durability is a testament to the engineering standards of its time.
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