Sperrstelle Schrattenfluh, Military fortification in Escholzmatt-Marbach, Switzerland.
The Sperrstelle Schrattenfluh is a military fortification built into the limestone mountain of the Schrattenwälder range above Marbach. The installation uses steep slopes and natural rock formations as integral elements of its defensive design.
The fortification was built during World War II as part of Switzerland's defense strategy against potential invasion. It was one of many strategic installations in the mountains designed to protect key passes and valleys.
The fortification represents Swiss military engineering excellence, demonstrating the nation's commitment to maintaining neutrality through defensive preparedness in mountainous terrain.
Access is via marked hiking trails starting from Marbach, though the route is steep and requires good fitness and sure-footedness. The best time to visit is between June and September when snow does not obstruct the path.
The site contains a network of underground tunnels and bunkers carved directly into the rock. Visitors can explore sections of these hidden defensive structures and observe how they were engineered to blend into the mountain.
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