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Fort WashingtonFort Washington
Autumn view of the Great Serpent Mound, the largest serpent effigy in the world, extending about 1,370 feet (420 m).  Originally though to have been constructed by prehistoric the Adena culture, scholars now think it was built by the Fort Ancient culture (1000-1650 CE), an Ohio Valley-based, mound-building society.  The Fort Ancient culture was influenced by the contemporary Mississippian culture society based along the mid-Mississippi River valley and extending as far north as the Great Lakes area.
Fort Sumter, South Carolina
Castle eiland Boston Massachusetts op een zonnige dag in juni
An aerial view of the remains of an auxiliary fort on Hadrian's Wall,  Housesteads Roman Fort, in Northumberland, England,in a middle of a green field
St. Catharines, Canada.
Garrison entrance of Fort KcHenry, Baltimore, Maryland, USA
Aerial view of Fort Clinch Fernandina Beach Florida photograph taken Dec 2021
Symbolic/spiritual mounds created by Native Americans in Effigy Mounds National Monument - May 2010
Sites of Charleston Harbor, South Carolina, Fort Moultrie
Battle of Crysler's Farm National Historic Site, aerial view
Drone shot of oil train cars at a chemical plant in Wyandotte, a small city south of Detroit in Wayne County, Michigan on an overcast day in Fall.
Aerial drone view of the ruin of Ruthven Barracks in Badenoch, in the Scottish Highlands, close to the town of Kingussie. Built in 1719 after the 1715 Jacobite uprising, it was later destroyed by Jacobites retreating after the Battle of Culloden in 1746.
moat around the fort
Beijing ancient city wall
Looking out from the top of the largest platform mound in the park, two people enjoy the 900 A.D. Middle Mississippian mound in Aztalan State Park with part of a reconstructed stockade. The Native American settlement was abandoned around 1200 A.D.
aerial view of Fort Clinch
A stone bridge with a stone archway leading to a courtyard. The courtyard is surrounded by stone walls and has a grassy area
Prospect, USA - October 9, 2021. Scenic view of Penobscot River and Fort Knox, Prospect, Maine, USA
an old fortress.
State College, Pennsylvania, USA - June 10, 2012: Campus of the Pennsylvania State University - Old Main Building
A photo of the entrance of Fort Sumter National Monument which is where the American Civil War Started.
Military museum of Belleville during day of springtime
An aerial of Halifax Citadel National Historic Site.
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 - named after Catherine of Braganza, Portuguese Princess, Queen of England - 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
Ancient city wall in Linhai City, Zhejiang Province, China
Aerial view of Fort Clinch a coastal fort in Fort Clinch State Park Ferandina Beach Florida photograph taken Nov.2017
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 .
Free Images: "bestof:Fort Mass.jpg Entrance to Fort Massachusetts 2006-08-18 own assumed Squatchy~commonswiki Fort Massachusetts Mississippi"
Fort Saint Nicolas Rhodes.jpg
Soldiers Monument - Gardner, MA - DSC00867.JPG
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Sunset from fort Alang.jpg
Windmill fort saint nicolas Rhodes.jpg
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Saint Nicolas Fort Rhodes Harbour night.jpg
Coffre-fort troglodyte Roque Saint-Christophe.jpg
Puertorican flags at fort san cristobal (san juan).jpg
Namutoni.jpg
Juan Griego sunset from Fortín La Galera.jpg
Flickr_-_Official_U.S._Navy_Imagery_-_Fort_Belvoir_Community_Hospital_(10).jpg
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Sunset in Juan Griego from Fortín de La Galera.jpg
San Carlos de la Barra Fort, Isla de San Carlos, Estado Zulia, Venezuela.jpg
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malta-red-keep-building-entrance-1247672.jpg
Water storing on Alang.jpg
Alang view with caves.jpg
Anang Madan Kulang - 3 forts range.jpg
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Ruins-of-an-ancient-palace-of-Bahmani-era-in-Bidar-India.jpg
Таракановский форт.jpg
Ruins-of-an-ancient-palace-of-Bahmani-era-in-Bidar-India.jpg
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Rhodes-the-medieval-building-of-the-Hospital-of-the-Knights.jpg
Panoramic of Juan Griego 45.jpg
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Detail venetian fortress harbour Heraklion.jpg
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US_Navy_080113-N-8933S-043_Information_Systems_Technician_2nd_Class_Mark_Heier,_assigned_to_the_amphibious_dock_landing_ship_USS_Fort_McHenry_(LSD_43)_as_part_of_Africa_Partnership_Station_(APS),_plays_soccer_with_local_Gabones.jpg
Beta vulgaris, San Francisco farmers market.jpg
Hadrian's Wall west of Housesteads 3.jpg
360° Panoramic view of Santa Rosa de la Eminencia Castle.jpg
Marin Headlands with Rodeo Beach.jpg
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Wounded Warriors play wheelchair basketball. (8446975315).jpg
Climbers Roque-Gageac.jpg
Saint-Cirq-Lapopie Falaise 5.JPG
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Green Bottom WMA looking toward Clover Site.jpg
Lion Venice fortress port Heraklion.jpg
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Dinoceras mirabile Marsh MNHN.jpg
Venetian fortress Heraklion port.jpg
Claude_Bernou_Carte_de_lAmerique_septentrionale.jpg
Detail venetian fortress harbour eastern part and dam Heraklion.jpg
Vase, exposition "Mayas", Musée du Quai Branly, Paris.jpg
Uva de playa (Coccoloba uvifera).jpg
South Bay Interchange.svg
Fort_Washington_(Cambridge,_Massachusetts)_-_080055pv.jpg
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Fitz_Hugh_Lane_-_The_Fort_and_Ten_Pound_Island,_Gloucester,_Massachusetts.jpg
Fitz_Hugh_Lane_-_The_Island_and_Fort_of_Ten_Pound,_Gloucester,_Massachusetts.jpg
Oregon Route 104.svg
FortHillSq_Boston_LOC120101v.jpg
Benjamin_Franklin_Butler_politician_-_Brady-Handy.jpg
Jean-Paul Flandrin - Odalisque with Slave - Walters 37887.jpg
Mary_Cassatt_-_The_Child's_Bath_-_Google_Art_Project.jpg
Claude_Monet_-_Arrival_of_the_Normandy_Train,_Gare_Saint-Lazare_-_Google_Art_Project.jpg
Fort Marion Entrance Civil War.jpg
House_at_Fort_Keogh.jpg
Fort Niagara LOCGeneral View of Battery.jpg
Fort_Marion_Civil_War_2.jpg
Upper_Fort_Street,_The_Rocks_1932.jpg
Fort Ord Soldiers Club HABS.jpg
Fort.svg
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Flag of Fort-Mardyck.png
Map highlighting Fort Russell Township, Madison County, Illinois.svg
Elizabeth Fort - Map - 1866.svg
Symbool fort.svg
Fort Moultrie flag.svg
Fort Ruijghaver 010.svg
Device fort plans Hull 1542.svg
Device fort plans Calshot.svg
Fort_Bath_wapen.svg
Flag of Fort Worth, Texas (through 2004).svg
Device fort plans Sandsfoot, Dorset.svg
Device fort plans Hurst, Dorset.svg
Device fort plans St.Mawes, Cornwall.svg
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