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Aerial view of Castillo de San Marcos National Monument St Augustine Florida photograph taken June 2021
Béjaïa / Bougie / Bgayet, Kabylia, Algeria: Borj Moussa fort / Fort Barral - built by the Spanish in the XVI century, over Hammadid period ruins / Fort Borj Moussa, ex Fort Barral - military work built by the Spanish during the first part of the sixteenth century in the footsteps of the Hammadite palace - photo by M.Torres
The fort Castillo de San Marcos in St. Augustine, Florida, taken early morning  with the city behind.
The Coquina stone built fort of Castillo De San Marcos national monument in Saint Augustine Florida. An ancient stone fort in America's oldest city.
Vilnius, Lithuania - 06 05 2023: An old military cannon sticks out of the bastion of the Vilnius defence wall.
Citadel Hill in Halifax is a fortress and a national historic site.  Aerial view showing the star shape of the walls, grass and some of the downtown city.
A weathered old brick tunnel with a narrow walkway meandering through it, showcasing the rich history and mystery of its structure.
Castillo de San Marcos National Monument - the ancient Spanish fortress, the major tourist attraction and landmark in Saint Augustine, Florida. Extra-large, high-resolution  stitched panorama.
Panoramic view of Ershawan Battery in Keelung, Taiwan. better known as the Tenable Gate of the Sea, It was built during Taiwan's Qing era.
Castillo de San Marcos National Monument historic fort panoramic on Matanzas Bay in St. Augustine Florida
Fort Macon Atlantic Beach North Carolina
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.
moat around the fort
Architectural details of the old cellular jail from British Occupation of the Andaman Islands.
Fort Jefferson is located on Garden Island, Dry Tortugas, and was originally built to guard the entrance to the Gulf of Mexico and was later used as a prison containing Dr. Mudd who threated John Wilkes Booth for a broken leg.
Norfolk Island Jail Ruins
Aerial view of Fort Gaines on Dauphin Island, Alabama at sunset
The former BHP mill under Line of Lode Miners Memorial. Broken Hill is a town prominent in Australia's mining and was listed on the National Heritage List in 2015 and remains Australia's longest running mining town. It has been referred to as \
Multiple arches in old FORT PICKENS
Fort DeSoto
Fort James, St. John's Harbour, Antigua
Fort Jefferson, located on Dry Tortugas Island in the Gulf of Mexico,  at the juncture of the Atlantic Ocean and The Caribbean Sea. In the State of Florida.  Formally a prison as well as a fort. Now a National Park
Fortification wall of Fort Henry in Kingston
Dauphin Island, AL, 2023:  A view looking down on buildings and stairs that are a part of Fort Gaines on Dauphin Island.
Masonry wall fortifications using coquina stone and moat of Castillo de San Marcos. This oldest of Spanish forts located in Saint Augustine Florida the oldest city in the United States dating to 1565 .
Dry Tortugas National Park, FL – September 13, 2018: A popular section of Fort Jefferson contains the prison cell of the infamous Dr. Samuel Mudd, one of the alleged conspirators in the Lincoln assassination
Elmina, Ghana: wrought iron railing over the central court of Saint George / São Jorge da Mina Castle, bearing the  'W' of the Dutch West India Company ('Geoctroyeerde West-Indische Compagnie', WIC, GWIC, GWC). Built by the Portuguese in 1482, first established as a trade settlement, the castle later became one of the most important stops on the route of the Atlantic slave trade. The Dutch West India Company seized the fort from the Portuguese in 1637.  The slave trade operated under the Dutch until 1814. In 1872, the Dutch Gold Coast, including the fort, became a British possession - colonial architecture - UNESCO World Heritage Site.
Beautiful Fort Clinch State Park in Amelia Island Florida
Aerial view of Senglea in Malta Island.
Free Images: "bestof:Fort San Jacinto - NARA - 278152.tif Scope and content General notes 278152 Local identifier War Department Office of the Chief of Engineers ~ Galveston"
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