Seesperre Nas, Fortified line at Lake Lucerne, Switzerland
The military complex includes two artillery installations, Ober Nas and Unter Nas, positioned along the narrow passage of Lake Lucerne between Nidwalden and Lucerne cantons.
The fortification system was constructed in 1940 as part of Switzerland's defense strategy during World War II, protecting the entrance to the national redoubt.
The Nidwalden Museum presents exhibitions about the naval defense system and military life through artifacts, documents, and photographs from the wartime period.
Visitors can access information about guided tours and opening hours through the Nidwalden Museum website, which maintains the historical fortification complex.
The defense system incorporated a 410-meter floating barrier with barbed wire and concrete blocks, making it the only naval fortification of its kind in Switzerland.
Location: Lucerne
Location: Nidwalden
Location: Schwyz
GPS coordinates: 46.99722,8.46739
Latest update: March 3, 2025 00:16
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