Category: fortification
- Multan Fort
- Fort Delpeche (ruins)
- Maginot Line Bichel Sud Shelter X19
- Arnala fort enterance
- Masmak fort
- Muneekh Fort
- Dambana ng Kagitingan
- Maginot Line Grand Lot shelter
- Ligne Maginot PC UNTERJAEGERHOF
- Ligne Maginot PC BUSSIERES
- Ligne Maginot Cuve WANTZENAU DIGUE 7
- Abri de Hatten museum
- Husn al-Qadisiyah
- Maginot Line Casemate Escherange Ouest C37
- Abri Ancienne Redoute (Ligne Maginot)
- PC WANTZENAU GARE (Ligne Maginot)
- Abri 2bis/2 Beinheim Sud (Ligne Maginot)
- 10/3 Abri de Statmatten (Ligne Maginot)
- Fort Entrance
- St Ann's Bay Old Fort and Jail
- The Greek and Roman Antique City of Tomis
- Forintos bastion
- Fortress
- Abri Reyervillers
- Abri du Freudenberg
- Maginot Line Ouvrage Metrich Block 1
- Block 2 - Obs Mont Gros
- Avante Post de Castes Ruines
- Obs Agaisen
- Cetatea romană tîrzie Callatis
- Fort Philip Long
- Observatoire KINDELBERG
- Shelter FROHMUEHLE
- Shelter AP ERLENMOOS
- Entree Mixed PO Lembach
- Observatory HUNSPACH - O4
- Shelter BUCHOLTZBERG
- Observatory O1 HATTEN
- Shelter BIRLENBACH
- Shelter SCHOENENBOURG
- Shelter HOFFEN
- Shelter DONAU
- City wall of Yuxian
- Wanghaotuan Fort
- Pandaoliang North Fort
- Fortress ruin
- Battery?
- Cuve OTTMARSHEIM Nord 2
- Emplacement PA de HOMBOURG 1
- Outer Castle of Jurisics Castle
- Fort Peabody
- Blockhaus BLOCHMONT Est
- Epaulement Maginot Pour AC25
- Maginot 75mm Canon Emplacement
- 25mm AT canon Emplacement
- Tourell Caste Ruines
- Kilgore Fort House
- Observatory Pic de Garuche Sud
- Artillery Position Mont de l'Ubac
- Observatory Mont des Mules
- Block 1 - Entrance - Obs Mont Gros
- Tunnel - Obs Mont Gros
- Obervatory Cote 942 Sud
- Dajin fortified village
- Abri et PC CHATEAU L'ABBAYE
- Cuve Cense de Choques (T1)