The National Redoubt is a vast defensive network of fortifications in the Swiss Alps, built to protect the nation during World War II.
The Seesperre Nas is a series of fortifications along the shores of lakes Lucerne, Nidwalden, and Schwyz.
Sperrstelle Frick is a series of fortifications spanning Frick, Switzerland.
The Hülftenschanz is a significant Swiss military fortification.
The Fortified Sector of Colmar was a section of the French Maginot Line defenses.
The Eppingen lines consist of defensive earthworks conceived to protect the region.
The Ettlingen Line was a defensive barrier in southwestern Germany.