Category: fortification
- Cittadella
- Форт Чиллаг
- Forte Barão do Rio Branco - 21° Grupo de Artilharia de Campanha
- Herefordshire Beacon/British Camp
- Цитадель Петерсберг
- The Citadel "Kal'at-al-Mina"
- Old Fort Erie
- City Fortress
- Forte São João (1547)
- Fortress Kyminlinna (Kyumengorod)
- Forte da Lagarteira (ou de Âncora)
- Briancon, Cité Vauban
- De Sikkepit
- Al Koot Fort
- قلعة ركيات - Al-Rekayat Fort : North fort
- Arab Fortress
- Forte de Santa Cruz de Itamaracá
- Fort Jalan Bani Bu Ali (Hammouda Al-Qala)
- Site of Fort Shahpur Qila
- Spandau Citadel
- Форт Горгаст
- قلعة صيرة
- Fortress Assos
- حصن منيف التأريخي
- قشلة وبوابة مدينة كوكبان
- Ost fort (East fort)
- The Historical Kishan Garh Fort
- Forte Duque de Caxias (Forte do Vigia)
- Цитадель Амьена
- Feste Opálka
- Капонир № 4
- BAT (BIRD) PLACE
- Schron Amunicyjny M-3 (brak śladów w terenie)
- Schron Piechoty J-3 (brak śladów w terenie)
- Restos de la muralla árabe
- Fort Cummings
- Ft Concho National Historic Landmark
- Berdavan Castle (10-11th c )
- Meghry fortress
- Bateria Avanzada de San Carlos
- Остатки бастионов
- Old Fort
- Muralla Zirí
- Muralla Zirí
- Rocca Manfrediana e Veneziana
- Granbury's Lunette (site)
- Civil War Site: Battle of Nashville - Redoubt 2
- Erkelenz Castle
- Kremenets Castle
- Burgstall der Burg Heeßel
- Lippoldsburg (frühmittelalterliche Wallburg )
- Kosh Castle (4 th c )