fortification
military constructions and buildings designed for defense in warfare and military bases
city walls of Pavia
building in Pavia, Italy
Bodine Castle
cultural Monument in Albania
Maximilian Tower
fortification in Venice, Italy
barbette
type of gun emplacement
compound
type of fortification
Bastille
fortress overlooking Grenoble, France
anti-submarine net
barrier placed across the mouth of a harbour or a strait for protection against submarines
Fort Gross Fredericksburg
fortified colonial trade-post in Ghana
bridgehead
bridge fortifications
Cairo Citadel
medieval Islamic-era fortification in Cairo, Egypt
Porta Claudia
fortification in Tyrol, Austria
Fort Crawford
19th century military outpost of the United States Army located in Prairie du Chien, Wisconsin
Castle San Felice
building in Verona, Italy
Alnwick town walls
Defensive walls built around Alnwick, England
Bare Island
island in Australia
Castle of Oblivion
castle and political prison in Iran
London Defence Positions
late 19th century scheme of earthwork fortifications in the south-east of England
Palmerston Forts
forts built around the coast of Britain during the 1860s to 1880s
East Anglian Palmerston Forts
19th century fortifications in the UK
North East England Palmerston Forts
19th century fortifications in the UK
Qasr el Banat
building in Egypt
Ibo fortresses
building in Mozambique
fortified settlement
human settlement of any kind with defensive structures
Saint Michael's Fortress
former fortification in Šibenik, Croatia
sconce
small protective fortification, such as an earthwork
polygonal fort
type of fortification
breastwork
fortification
sangar
military fortification
San Juan National Historic Site
U.S. national park in Puerto Rico
Duke's Chest Castle
was built in 1255 as the additional fortification to the southwest part of the city wall
Fortifications of Malta
defensive military constructions of the Maltese archipelago
fortified house
type of fortification
North Caucasus Line
fortification
fort
military construction designed for defensive warfare
Alpine Wall
Italian defensive fortifications
Royal Military Canal
defensive canal in southern England