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The pentegonal courtyard of Fort Belgica on Bandaneira Island in Indonesia.
Cacheu, Guinea-Bissau: cannon bearing the coast of arms of Portugal on the ramparts Cacheu fort, , fortress located next to the mouth of the Cacheu river, first established in 1588 by Manuel Lopes Cardoso to protect the first Portuguese Factory (trading post) in the area, the current building dates from 1641‐1647, built by captain-major Gonçalo Gambôa de Ayalla.
Old Japanese bunker from second world war at a beach outside the city of Sabang which in the main city on the island Weh north of Sumatra
Inside old ruined burnt red brick fortress.
Architecture of Fort Knox, Prospect, Maine, USA
Fort Gorges is a former United States military fort built on Hog Island Ledge in Casco Bay, Maine, United States.  Built from 1858 to 1864, no battles were fought there and no troops were stationed there.
Stockade walls and gates to the interior of Fort Ross Historic Park, Sonoma County, California
Al Qasr, old village in Dakhla Desert, Egypt
St. George's Island,  Bermuda: Fort St. Catherine, coastal artillery fort at the North-East tip of St. George's Island, in the Imperial fortress colony of Bermuda - The first wooden fort was built on the site in 1612, the current structure dates mostly from the 19th century - Coot Pond Road - UNESCO World Heritage Site.
The inside passage of an abandoned 19th century historic fort in Kaunas city (Lithuania).
Bora Bora, French Polynesia - 2001: A photograph of an old World War II cannon perched on top of the extinct volcano of Mount Otemanu on the top of Bora Bora island overlooking the ocean below, as shot on the rare Canon EOS 1N - Kodak DCS 520, one of the first professional digital cameras.
Part of historic Fuerte Bulnes fort near Punta Arenas in Chile
the wall of stone city ruins at Taxkorgan, Xinjiang Uyghur Autonomous Region, China.
Preserved Fort Holmes on Historic Mackinac Island in Michigan
Louisbourg, Canada - August 27, 2022. People explore the historic buildings at the Fortress of Louisbourg.
Old vaulted basement under abandoned castle.
Vieux Grand Port, Grand Port District, Mauritius, Mascarene Islands: ruins of Fort Frederik Henrik - The uninhabited island was discovered in 1507 by the Portuguese who established a visiting base. The first permanent settlement would only arrive more than a century later, in 1638, built by the sailors of another adventurous European nation, the Netherlands, who named it after Frederik Henrik, Prince of Orange, naming the island itself after Maurice, Prince of Orange. Parts of the fort were later built over by the French.
Gun of coastal batterie in Vladivostok fortress and Cable-stayed bridge. Island of Russian, Vladivostok, Russia.
Toronto Fort York with CN Tower and the city in the background.
Kristiansten Festning Fortress in Trondheim in Norway
The walkway and grounds of Scaur Hill Fort and Park, Bermuda.
Fort Suomenlinna, Sveaborg, Helsinki, Finland - UNESCO World Heritage Site, old fort in August 12, 2011
Fortress wall at Fort Knox State Park, Prospect, Maine, USA
The Historical Belgica Fort in Banda Naira Island, Central Maluku, Indonesia
ruins of Ancient City of Jiaohe( Jiaohe Gucheng), Turpan, Xinjiang Uyghur Autonomous Region, China.
ukraine, tarakanov fortress ruin
Bora Bora, French Polynesia - 2001: A photograph of an old World War II cannon perched on top of the extinct volcano of Mount Otemanu on the top of Bora Bora island overlooking the ocean below, as shot on the rare Canon EOS 1N - Kodak DCS 520, one of the first professional digital cameras.
Old Fort Niagara at Summer American History
La Preneuse, Rivière Noire (Black River), Mauritius: British built Martello tower, dating from the 1830s, erected to protect  Black River bay. Martello towers as named after the Italian word for hammer, as in the original towers in the west coast of Italy a hammer and a bell were used to sound the alarm in case of imminent attack.
Free Images: "bestof:Interior view of the North Fort of Taku on the Peiho River.jpg Interior of the North Fort After the occupation of the North Taku Forts by British and French"
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