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The Castillo de San Marcos is one of the historic landmarks of St. Augustine, Florida. The castle dates to 16th century, and is the oldest and largest masonry fort in the continental United States. People.
Blue wall of Chefchaouen, small town in northwest Morocco famous by its blue buildings
the royal fortification March 11, 2017 Cannes France
Jinshanling Great Wall, located in Hebei province
Chapel of St. Segundo next to the Cathedral of Avila. Low angle view of the facade
Phra Sumen Fort is one of the remaining forts that were built during the end of the 18th century to protect Bangkok from possible invasions.\nA roofed heptagonal tower collapsed sometime during the reigns of kings Rama V to Rama VII and was rebuilt in 1981 to celebrate the bicentennial of the city's foundation.\nThe surrounding area was subsequently developed into Santichaiprakarn Park, which opened in 2000.\nToday, four of Bangkok's defensive forts remain. These structures, as well as the canals that formed the city moats, are listed as registered ancient monuments.\nBangkok, Thailand, Asia.
Limassol, Cyprus - May 20, 2023: Landscape with Kolossi castle, Limassol, Cyprus
Guard Tower - Castillo de San Marcos - St. Augustine Fl.
La Habana, Cuba - 6 january 2016: Fortless of Real Fuerza in Plaza de Armas at Old Havana, Cuba
Grand Canyon, USA - January 28, 2016: An editorial stock photograph of the Desert View Watchtower located at the South Rim of the Grand Canyon. Desert View Watchtower, one of Mary Colter's best-known works, was built in 1932. Situated at the far eastern end of the South Rim, 27 miles (43 km) from Grand Canyon Village, the tower stands 70 feet (21 m) tall. The top of the tower is 7,522 feet (2,293 m) above sea level, the highest point on the South Rim. It offers one of the few full views of the bottom of the Canyon and the Colorado River.
Sea side view to old fortress of Alanya, Turkey.
The Helles Memorial serves the dual function of Commonwealth battle memorial for the whole Gallipoli campaign and place of commemoration for many of those Commonwealth servicemen who died there and have no known grave. The United Kingdom and Indian forces named on the memorial died in operations throughout the peninsula, the Australians at Helles.
House of the Cenote, Mayan Ruins in Tulum, Riviera Maya, Yucatan, Caribbean Sea, Mexico.
Cartagena, Colombia.  A tourist destination, the old city is inside walls that were originally built to protect the town from pirate attacks.  The walls, shown here, still remain and walking along the top of them is a popular pastime.
Trieste, located in northeastern Italy, is a city with a unique blend of Italian, Central European, and Mediterranean influences. It boasts historic architecture, a vibrant cultural scene, and a rich maritime heritage due to its strategic location by the Adriatic Sea.
Capital Cities, Castle, City, Cityscape, Cuba. Cannon at the front, castle on the background.
archaeological site with sky in Thailand
The Great Wall of China covered in light snow
Morning shot of Prince Naguib Palace with intricate Mamluk Architecture, Cairo, Egypt
Jinshanling Great Wall, located in Hebei province
Lighthouse of Ponta dos Capelinhos in Faial, the Azores
Perspective of the San Marcos Castillo - St. Augustine, Fl.
Tourists visiting Kruje Castle and its fortress with walls. Albania
The ruins of the old city fortress in Belgrade, Serbia that is now part of the central city.
Istanbul, Turkey - September 13, 2015: The Gate of Salutation, entrance to the Topkapi Palace on september 13 Istanbul, Turkey.Topkapı Palace, was the administrative, educational and art center of the Ottoman Empire.
A panoramic view of the outside fortification wall of the Halifac Citadel during sunset
The walls of Talavera are a defensive set that protected this Spanish city, in the province of Toledo. The town came to have three walled enclosures, whose layouts were tangential to the Islamic citadel. Currently, a good part of the wall of the first enclosure, the oldest, and some remains of the second are preserved.
A view of Castel Sant'Angelo over Tiber river. The Mausoleum of Hadrian, usually known as Castel Sant'Angelo, is a towering cylindrical building in Parco Adriano, Rome, Italy.
Tawila village in mountains of Yemen
In this photo you can see a bastion from the wall of Palma
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