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
Alhambra
Antonine_Wall
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
Drawbridge
Führerbunker
Beaumaris_Castle
Masada
Osaka_Castle
Oppidum
Dungeon
Lahore_Fort
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
Rohtas_Fort
Glamis_Castle
Dunstable
Château_de_Montsoreau
Military_camp
Tower_of_David
Kumamoto-Castle
Bamburgh_Castle
Suomenlinna
Duffield_Castle,_Derbyshire
Kronborg
Offa's_Dyke
Arundel_Castle
Fort_Ticonderoga
Bran_Castle
Gatehouse
Neuf-Brisach
Royal_Alcazar_of_Madrid
Kowloon_Walled_City
Blockhouse
Sinjar
Bodrum_Castle
Sudeley_Castle
Bankstown_Bunker
St_Michael's_Mount
Hindenburg_Line
Hwaseong_Fortress
Agra_Fort
Gingee_Fort
Carisbrooke_Castle
Roman_Walls_of_Lugo
Trezzo_sull'Adda
Malatya
London_Wall
Ringfort
Acrocorinth
Lichtenstein_Castle
Petit_Théâtre_de_la_Reine
List_of_castles_in_Spain
Ehrenbreitstein
Vellore_Fort
Aït_Benhaddou
Wolf's_Lair
Tower_house
Limes_(Roman_Empire)
Shurijo
Fort_Provintia
Siege_of_Sarajevo
Walls_of_Ávila
Dzong
Bellver_Castle
Alcazaba_of_Almería
Palace_of_Ardashir
Arg_of_Karim_Khan
Drobeta-Turnu_Severin
Strongpoint
Cathar_castles
Carrickfergus_Castle
Durham_Castle
Peyrepertuse_Castle
Goryōkaku
Muiderslot
Civitella_in_Val_di_Chiana
Siege_of_Mariupol
Slighting
Fort_Leavenworth
Castles_and_Town_Walls_of_King_Edward_in_Gwynedd
Lincoln_Castle
Củ_Chi_tunnels
Dunluce_Castle
Ghal'eh_Dokhtar
Fort_Amsterdam
West_Point,_New_York
Framlingham_Castle
Powys_Castle
Raigad_Fort
Saalburg
Dunstanburgh_Castle
Făgăraș
Chester_city_walls
Sarvestan_palace
Ashtown_Castle
Ludlow_Castle
Flame_fougasse
Prague_Castle
List_of_castles_and_fortresses_in_Azerbaijan
Syzran
Fall_of_the_Berlin_Wall
Bothwell_Castle
Cittadella
List_of_walls
Tughlaqabad_Fort
Château_de_Chaumont
Bunratty_Castle
Odawara_Castle
Bishop's_Castle
Dunscaith_Castle
Bolingbroke_Castle
Naarden
Parapet
Château_de_Nantouillet
Buda_Castle
Dung_Gate
Akershus_Fortress
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
Winchester_Castle
São_Jorge_Castle
Melilla_la_Vieja
Pavlov's_House
Ninth_Fort
Deganwy
Fallout_shelter
Chillon_Castle
Forts_in_India
Aquincum
Nottingham_Castle
Makurdi
Nagoya_Castle
Vaduz_Castle
Fort_George,_Highland
Ai-Khanoum
Fort_Banks
Devín_Castle
Crenellation
Starved_Rock_State_Park
Lalbagh_fort
Brahan_Castle
Ranikot_Fort
Hertford_Castle
Armeniac_Theme
Maruoka_Castle
Wallingford_Castle
Shrewsbury_Castle
Culzean_Castle
Taku_Forts
Chepstow_Castle
Deddington
Fortaleza_do_Monte
Isca_Augusta
Bronllys
Fort_Caroline_National_Memorial
Citadel_of_Namur
Ixworth
Raudonė_Castle
Guia_Fortress
Fort_Santo_Domingo
The_Wrekin
Newcastle_Castle,_Bridgend
Promontory_fort
Chesters_Bridge
Yonezawa_Castle
Echizen_Ono_Castle
Karasawa_Castle
Rudelsburg
Shell_keep
Devil's_Dyke
Cley_Marshes
Tour_du_Guet
Bradleys_Head_Fortification_Complex
Fort_Orleans
Two_Lights_State_Park
Karacahisar_castle
Lawrence_blockhouses
Fort_Simple