Berlin_Wall
Great_Wall_of_China
Castle
Tower_of_London
Carcassonne
Fortification
Hadrian's_Wall
Siege
Windsor_Castle
Brandenburg_Gate
Alcatraz_Island
Bethlehem
Bastille
Fort_Sumter
Acropolis_of_Athens
Edinburgh_Castle
Moat
Antonine_Wall
Alhambra
Defensive_wall
Gate
Moscow_Kremlin
Maginot_Line
Conwy_Castle
Citadel
Bunker
Fort_Knox
Military_base
Barracks
Homs
Kremlin
Siege_of_Leningrad
Wartburg_Castle
Atlantic_Wall
Hillfort
Caernarfon_Castle
Siege_of_Tobruk
Motte-and-bailey
Himeji_Castle
Stirling_Castle
Führerbunker
Beaumaris_Castle
Drawbridge
Masada
Osaka_Castle
Oppidum
Lahore_Fort
Dungeon
Tintagel_Castle
Warwick_Castle
City_gate
Corfe_Castle
Hadrian's_Mausoleum
Castle_of_Mey
Vindolanda
Blarney_Castle
Watchtower
Aigues-Mortes
Château_de_Blois
Edo_Castle
Glamis_Castle
Rohtas_Fort
Dunstable
Château_de_Montsoreau
Military_camp
Tower_of_David
Kumamoto-Castle
Bamburgh_Castle
Suomenlinna
Duffield_Castle,_Derbyshire
Kronborg
Offa's_Dyke
Fort_Ticonderoga
Arundel_Castle
Bran_Castle
Gatehouse
Neuf-Brisach
Royal_Alcazar_of_Madrid
Kowloon_Walled_City
Blockhouse
Sinjar
Bodrum_Castle
Sudeley_Castle
St_Michael's_Mount
Hindenburg_Line
Hwaseong_Fortress
Agra_Fort
Carisbrooke_Castle
Roman_Walls_of_Lugo
Trezzo_sull'Adda
Malatya
Gingee_Fort
London_Wall
Ringfort
Acrocorinth
Petit_Théâtre_de_la_Reine
Lichtenstein_Castle
List_of_castles_in_Spain
Ehrenbreitstein
Vellore_Fort
Aït_Benhaddou
Wolf's_Lair
Tower_house
Shurijo
Limes_(Roman_Empire)
Fort_Provintia
Siege_of_Sarajevo
Walls_of_Ávila
Dzong
Bellver_Castle
Alcazaba_of_Almería
Arg_of_Karim_Khan
Palace_of_Ardashir
Bankstown_Bunker
Drobeta-Turnu_Severin
Strongpoint
Carrickfergus_Castle
Durham_Castle
Cathar_castles
Goryōkaku
Muiderslot
Civitella_in_Val_di_Chiana
Peyrepertuse_Castle
Slighting
Siege_of_Mariupol
Fort_Leavenworth
Castles_and_Town_Walls_of_King_Edward_in_Gwynedd
Lincoln_Castle
Dunluce_Castle
Củ_Chi_tunnels
Ghal'eh_Dokhtar
Fort_Amsterdam
West_Point,_New_York
Framlingham_Castle
Powys_Castle
Raigad_Fort
Saalburg
Dunstanburgh_Castle
Făgăraș
Sarvestan_palace
Chester_city_walls
Ashtown_Castle
Ludlow_Castle
Flame_fougasse
Prague_Castle
List_of_castles_and_fortresses_in_Azerbaijan
Fall_of_the_Berlin_Wall
Syzran
Cittadella
Bothwell_Castle
List_of_walls
Château_de_Chaumont
Tughlaqabad_Fort
Bunratty_Castle
Odawara_Castle
Bishop's_Castle
Dunscaith_Castle
Bolingbroke_Castle
Naarden
Château_de_Nantouillet
Parapet
Buda_Castle
Dung_Gate
Okayama_Castle
Pleshey
Siege_of_Jerusalem_(70_CE)
Bridgnorth_Castle
Lindisfarne_Castle
Royal_Castle,_Warsaw
Henry_Head_Battery
Saint-Martin-de-Ré
Belém_Tower
Château_d'Usson
Brampton_Bryan_Castle
Wat's_Dyke
Danbury,_Essex
Georges_Head_Battery
Krak_de_Chevaliers
Red_Bay_Castle
Fort_Ouiatenon
São_Jorge_Castle
Melilla_la_Vieja
Pavlov's_House
Ninth_Fort
Deganwy
Chillon_Castle
Fallout_shelter
Aquincum
Makurdi
Nottingham_Castle
Nagoya_Castle
Vaduz_Castle
Fort_George,_Highland
Ai-Khanoum
Forts_in_India
Fort_Banks
Devín_Castle
Crenellation
Starved_Rock_State_Park
Lalbagh_fort
Ranikot_Fort
Hertford_Castle
Armeniac_Theme
Brahan_Castle
Maruoka_Castle
Wallingford_Castle
Culzean_Castle
Shrewsbury_Castle
Taku_Forts
Chepstow_Castle
Deddington
Fortaleza_do_Monte
Isca_Augusta
Bronllys
Citadel_of_Namur
Fort_Caroline_National_Memorial
Raudonė_Castle
Guia_Fortress
Ixworth
Fort_Santo_Domingo
Newcastle_Castle,_Bridgend
Echizen_Ono_Castle
Chesters_Bridge
Yonezawa_Castle
Promontory_fort
Karasawa_Castle
Rudelsburg
Bradleys_Head_Fortification_Complex
Shell_keep
Cley_Marshes
Fort_Orleans
Tour_du_Guet
Devil's_Dyke
Karacahisar_castle
Two_Lights_State_Park
Lawrence_blockhouses
Fort_Simple