Castel del Monte castle surrounded by its pristine landscape, Murge, Bari, Apulia, ItalyTown centre of Dinant with Cathedral Notre Dame and Citadel, Namur, Wallonia, BelgiumCastillo de San Marcos National Monument at morning, St. Augustine, Florida, USA
Abandoned Inca citadel Machu Picchu in the Eastern Cordillera of southern PeruRock formations and dunes at Tin Akachaker desert (Citadel), Hoggar, Ahaggar Mountains, Algeria
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