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Hardknott Roman Fort interior looking west along the Eskdale Valley to the Solway Firth, South Lakes, Lake District National Park, Cumbria, England, United Kingdom, Europe
White sand beach and turquoise waters in front of Fort Jefferson, Dry Tortugas National Park, Florida Keys, Florida, United States of America, North America
Huge stone walls the fortress of Suwon, UNESCO World Heritage Site, South Korea, Asia
Huge stone walls around the fortress of Suwon, UNESCO World Heritage Site, South Korea, Asia
Fresh Spring snow at dawn highlight ripples and marks in the sand beneath Bamburgh Castle, Bamburgh, Northumberland, England
Victor Column, Kalemegdan Fortress, Belgrade, Serbia, Europe
Pennard Castle, overlooking Three Cliffs Bay, Gower, Wales, United Kingdom, Europe
Cardiff Castle, Bute Park, Cardiff, Wales, United Kingdom, Europe
Church of Surb Astvatsatsin (Vahramashen Church) at Amberd fortress located on the slopes of Mount Aragats, Yerevan, Aragatsotn, Armenia, Central Asia, Asia
Amberd fortress located on the slopes of Mount Aragats, with Mount Ararat in the distance, Yerevan, Aragatsotn, Armenia, Central Asia, Asia
Norman Keep, Cardiff Castle, Cardiff, Wales, United Kingdom, Europe
Norman Keep, Cardiff Castle, Cardiff, Wales, United Kingdom, Europe
Norman Keep, Cardiff Castle, Cardiff, Wales, United Kingdom, Europe
Aerial image of Maiden Castle, an Iron Age hill fort, Winterborne Monkton, near Dorchester, Dorset, England, United Kingdom, Europe
Aerial image of Dover Castle over the white Cliff of Dover, Kent, England, United Kingdom, Europe
Aerial image of Carisbrooke Castle, a historic motte-and-bailey castle, Carisbrooke, near Newport, Isle of Wight, England, United Kingdom, Europe
Aerial image of Windsor Castle, the largest inhabited castle in the world, Windsor, Berkshire, England, United Kingdom, Europe
Aerial image of Herstmonceux Castle, a brick-built Tudor castle near Herstmonceux, East Sussex, England, United Kingdom, Europe
Aerial image of Bamburgh Castle, a Norman castle built on a basalt outcrop on the coast, Bamburgh, Northumberland, England, United Kingdom, Europe
Aerial image of Corfe Castle, Purbeck Hills, between Wareham and Swanage, Dorset, England, United Kingdom, Europe
Aerial image of Maiden Castle, an Iron Age hill fort, Winterborne Monkton, near Dorchester, Dorset, England, United Kingdom, Europe
Aerial image of Maiden Castle, an Iron Age hill fort, Winterborne Monkton, near Dorchester, Dorset, England, United Kingdom, Europe
Sigiriya Rock Fortress, UNESCO World Heritage Site, seen from Pidurangala Rock, Sri Lanka, Asia
Dunnottar Castle outside of Stonehaven, Aberdeenshire, Scotland, United Kingdom, Europe
Interior courtyard, Palanok Castle, Mukachevo, Transcarpathia, Ukraine, Europe
Top view of the spiral stairs inside the towers of masonic Initiation Well at Quinta da Regaleira, Sintra, Portugal, Europe
Tsarevets Fortress, Veliko Tarnovo, Bulgaria, Europe
Pennard Castle, overlooking Three Cliffs Bay, Gower, Wales, United Kingdom, Europe
Pennard Castle, overlooking Three Cliffs Bay, Gower, Wales, United Kingdom, Europe
Al Murabbaa Heritage Fort, Al Ain, Abu Dhabi, United Arab Emirates, Middle East
Chateau de Peyrepertuse, a Cathar castle, Languedoc, France, Europe
St. Rules Tower at St. Andrews Cathedral, Fife, Scotland, United Kingdom, Europe
St. Andrews Castle, Fife, Scotland, United Kingdom, Europe
St. Andrews Castle, Fife, Scotland, United Kingdom, Europe
Bamburgh Castle and beach, Northumberland, England, United Kingdom, Europe
Giant statue of Mubarek Ahmed Sharafaddin in front of the citadel of Erbil (Hawler), capital of Iraq Kurdistan, Iraq, Middle East
Hvar Town and tourists at Hvar Spanish Fort (Fortica) at sunset, Hvar Island, Dalmatian Coast, Adriatic, Croatia, Europe
Roman military camp ruins and the Judaean desert, seen from the Masada fortress, UNESCO World Heritage Site, Israel, Middle East
Monument to Overseas Combatants, of the Colonial Wars, Fortress of Good Success (Forte do Bom Sucesso), Belem, Lisbon, Portugal, Europe
Monument to Overseas Combatants, of the Colonial Wars, Fortress of Good Success (Forte do Bom Sucesso), Belem, Lisbon, Portugal, Europe
View over the beautiful mountains around the Citadelle Laferriere, UNESCO World Heritage Site, Cap Haitien, Haiti, Caribbean, Central America
Aberystwyth Castle, Ceredigion, West Wales, United Kingdom, Europe
St. Mawes Castle and coastline, St. Mawes, Cornwall, England, United Kingdom, Europe
Bolsover Castle and corn field at sunset, Bolsover, Derbyshire, England, United Kingdom, Europe
Citadelle Laferriere, UNESCO World Heritage Site, Cap Haitien, Haiti, Caribbean, Central America
View of rocks and Mirow Castle ruins illuminated at night, Polish Jura, Poland, Europe
Old town and St. Nicholas church on top of Narikala Fortress, Tbilisi, Georgia, Caucasus, Central Asia, Asia
Lion Rock Fortress, UNESCO World Heritage Site, Sigiriya, Sri Lanka, Asia
Bebris Tsikhe castle, Mtskheta, historical capital Georgia, Caucasus, Central Asia, Asia
The 16th and 17th century fort and monastery at Basgo, Ladakh, Himalayas, India, Asia
The 16th and 17th century fort and monastery at Basgo, Ladakh, Himalayas, India, Asia
Fort St. Ivana, Dubrovnik, Croatia, Europe
Burg Kreuzenstein castle, Leobendorf, Weinviertel Region, Lower Austria, near Vienna, Austria, Europe
The fortress of Massangano, Cuanza Norte, Angola, Africa
The fortress of Massangano, Cuanza Norte, Angola, Africa
Sizergh Castle Courtyard, near Kendal, Cumbria, England, United Kingdom, Europe
Edinburgh Castle, historic fortress, Castle Rock, Castlehill, Edinburgh Old Town, UNESCO World Heritage Site, Midlothian, Scotland, United Kingdom, Europe
The port of Hvar Town and the Spanish Fortress at dusk, Hvar, Croatia, Europe
Rosenborg Slot in the snow, Copenhagen, Denmark, Scandinavia, Europe
Sar Yazd fortress, Iran, Middle East
Narenj citadel, Nain city, Isfahan Province, Iran, Middle East
Narenj citadel, Nain city, Isfahan Province, Iran, Middle East
Narenj citadel, Nain city, Isfahan Province, Iran, Middle East
Edinburgh Castle, UNESCO World Heritage Site, Edinburgh, Scotland, United Kingdom, Europe
Dunster Castle, Somerset, England, United Kingdom, Europe
Doonagore Castle, Doolin, Cliffs Coastal Walk, County Clare, Munster, Republic of Ireland, Europe
Fortress of Kufstein, Tyrol, Austria, Europe
Caerphilly Castle, Cardiff, Wales, United Kingdom, Europe
Porto Palermo, South coast, Albania, Europe
Rooftops, Cathedral twin towers, Citadel Castle, Salzburg, Austria, Europe
Prague skyline at night with Prague Castle, St. Vitus Cathedral, Mala Strana and Charles Bridge, UNESCO World Heritage Site, Prague, Czech Republic, Europe
Drone view of the hilltop village of Saint-Suzanne in the Mayenne area, France, Europe
View to Our Lady before Tyn Church and Prague Castle at dusk, UNESCO World Heritage Site, Prague, Bohemia, Czech Republic, Europe
View from the banks of Vltava River over the Mala Strana district and Prague Castle, UNESCO World Heritage Site, Prague, Bohemia, Czech Republic, Europe
Prague Castle and St. Vitus Cathedral seen from the banks of Vltava River at first sunlight, UNESCO World Heritage Site, Prague, Bohemia, Czech Republic
Sunlit Venetian Bourtzi Fortress, island, Nafplio (Nafplion), near Argos, Argolic Gulf, eastern Peloponnese, Greece, Europe
Egeskov Castle (Egeskov Slot), Funen, Denmark, Europe
Egeskov Castle (Egeskov Slot), Funen, Denmark, Europe
Obidos castle, Leiria District, Estremadura, Portugal, Europe
St. Mawes Castle, an artillery fort constructed by King Henry VIII near Falmouth, Cornwall, England, United Kingdom, Europe
Fortezza Vecchia, Livorno, Tuscany, Italy, Europe
The hilltop village of Saint-Suzanne in the Mayenne area of France, Europe
The hilltop village of Saint-Suzanne in the Mayenne area of France, Europe
Luynes, Indre et Loire, France, Europe
Aerial of the chateau and vineyards of Luynes, Indre et Loire, France, Europe
The Castle, River Coquet, Warkworth, Northumberland, England, United Kingdom, Europe
Sizergh Castle and Garden, South Kendal, Cumbria, England, United Kingdom, Europe
The Folly at Mow Cop with incredible sunset, Mow Cop, Cheshire, England, United Kingdom, Europe
Dramatic sunset at Mow Cop Castle, border of Staffordshire and Cheshire, England, United Kingdom, Europe
The Tower of Belem (Torre de Belem), the 16th century Manueline fortress, UNESCO World Heritage Site, on the River Tagus (Rio Tejo), Belem, Lisbon, Portugal, Europe
Caerphilly Castle, Cardiff, Wales, United Kingdom, Europe
Fortified Ibiza Old Town (Dalt Vila), UNESCO World Heritage Site, Ibiza, Balearic Islands, Spain, Europe
Al Murabbaa Heritage Fort, Al Ain, Abu Dhabi, United Arab Emirates, Middle East
View from Lovrijenac Fortress to the city walls of Dubrovnik at sunrise, UNESCO World Heritage Site, Croatia, Europe
View to the Lovrijenac Fortress (St. Lawrence Fortress) on a stormy day, Croatia, Europe
Rocca Calascio Castle and Santa Maria della Pieta?Church, Gran Sasso e Monti della Laga National Park, Abruzzo, Italy, Europe
Kidwelly Castle, Carmarthenshire, Wales, United Kingdom, Europe
Blair Castle, ancestral home of Clan Murray, Blair Atholl, Perthshire, Scotland, United Kingdom, Europe
Buda Castle, the historic seat of the Hungarian kings in Budapest, dating from the 18th century, UNESCO World Heritage Site, Budapest, Hungary, Europe
Huge stone walls around the fortress of Suwon, UNESCO World Heritage Site, South Korea, Asia