BlockhouseW
Blockhouse
Pillbox (military)W
Pillbox (military)
Austro-Hungarian fortifications on the Italian borderW
Austro-Hungarian fortifications on the Italian border
Braefoot BatteryW
Braefoot Battery
Coastal fortifications of New ZealandW
Coastal fortifications of New Zealand
Czechoslovak border fortificationsW
Czechoslovak border fortifications
Downing Point BatteryW
Downing Point Battery
Fort BenghisaW
Fort Benghisa
Fort Campbell (Malta)W
Fort Campbell (Malta)
Fortifications of Paris in the 19th and 20th centuriesW
Fortifications of Paris in the 19th and 20th centuries
Commission for Organising the Fortified RegionsW
Commission for Organising the Fortified Regions
Italian fortifications on the Austro-Hungarian borderW
Italian fortifications on the Austro-Hungarian border
Maginot LineW
Maginot Line
Matsushiro Underground Imperial HeadquartersW
Matsushiro Underground Imperial Headquarters
Border Line (Switzerland)W
Border Line (Switzerland)
Wardija BatteryW
Wardija Battery