The inner citadel, Arg-e Bam, Bam, Iran, Middle East

The Citadel, Victoria, Gozo Island, Malta, Europe

Rooftops, Cathedral twin towers, Citadel Castle, Salzburg, Austria, Europe

Statue of Liberation Monument (Liberty Statue), The Citadel, Gellert Hill, Budapest, Hungary, Europe

12th century Crusader castle in biblical land of Moab, Kerak, Jordan, Middle East

Shobak Castle, 12th century Crusader castle, Jordan, Middle East

View on Cluj-Napoca from the Citadel Hill with Saint Michael's Church, Cluj-Napoca, Transylvania, Romania, Europe

View on Cluj-Napoca from the Citadel Hill with Saint Michael's Church, Cluj-Napoca, Transylvania, Romania, Europe

Sunrise over the citadel and castle, Peniscola, Costa del Alzahar, Valencia, Spain, Mediterranean, Europe

View over Cluj-Napoca from the Citadel Hill with Saint Michael's Church, Cluj-Napoca, Transylvania, Romania, Europe

Citadel cannons, Brimstone Hill Fortress National Park, UNESCO World Heritage Site, St. Kitts, St. Kitts and Nevis, Leeward Islands, West Indies, Caribbean, Central America

Kuelap, precolombian ruin of citadel city, Chachapoyas view, Peru, South America

Citadel, Corte, Corsica, France, Mediterranean, Europe

Citadel ramparts, Brimstone Hill Fortress National Park, UNESCO World Heritage Site, St. Kitts, St. Kitts and Nevis, Leeward Islands, West Indies, Caribbean, Central America

Byzantine Citadel, Selcuk, Anatolia, Turkey, Asia Minor, Eurasia

Young woman sitting on a defensive wall of Smbataberd Fortress, on the crest of a hill between the villages of Artabuynk and Yeghegis, near Yeghegnadzor, Vayots Dzor province, Armenia, Eurasia

Aerial of the Cite de Carcassonne citadel, UNESCO World Heritage Site, Carcassonne, Aude, Occitania, France, Europe

Aerial of the Cite de Carcassonne citadel, UNESCO World Heritage Site, Carcassonne, Aude, Occitania, France, Europe

Aerial of the Cite de Carcassonne citadel, UNESCO World Heritage Site, Carcassonne, Aude, Occitania, France, Europe

Cite de Carcassonne citadel, UNESCO World Heritage Site, Carcassonne, Aude, Occitania, France, Europe

Medieval citadel, Carcassonne, a hilltop town in southern France, UNESCO World Heritage Site, Carcassonne, Languedoc, France, Europe

Medieval citadel, Carcassonne, a hilltop town in southern France, UNESCO World Heritage Site, Carcassonne, Languedoc, France, Europe

The Temple of Hercules within the Amman Citadel (Jabal al-Qal'a), historic site located on top of a hill in the heart of Amman, Jordan, Near East, Southern Levant, West Asia

The Temple of Hercules within the Amman Citadel (Jabal al-Qal'a), historic site located on top of a hill in the heart of Amman, Jordan, Middle East

North-East district with the Jordanian flag on a 126m flagpole in front of the Raghadan Palace in the background, viewed from the top of Citadel Hill, Amman, Jordan, Middle East

View of the Acropolis of Athens, UNESCO World Heritage Site, from Mouseion Hill, located to the southwest, Athens, Greece, Europe

View of the Roman theatre and the South-East districts from the top of the Citadel hill, Amman, Jordan, Middle East

View of the Roman theatre and the South-East districts from the top of the Citadel hill, Amman, Jordan, Middle East

View of the South-East districts from the top of the Citadel hill, Amman, Jordan, Middle East

The Temple of Hercules within the Amman Citadel (Jabal al-Qal'a), historic site located on top of a hill in the heart of Amman, Jordan, Near East, Southern Levant, West Asia

Young boy flying a kite in the enclosure of the Amman Citadel (Jabal al-Qal'a), historic site located on top of a hill in the heart of Amman, Jordan, Middle East

Two young Jordanian men sitting on a bench facing the Temple of Hercules within the Amman Citadel (Jabal al-Qal'a), historic site located on top of a hill in the heart of Amman, Jordan, Middle East

North-East district with the Jordanian flag on a 126m flagpole in front of the Raghadan Palace in the background, viewed from the top of Citadel Hill, Amman, Jordan, Middle East

View of the Acropolis of Athens, UNESCO World Heritage Site, from Mouseion Hill, located to the southwest, Athens, Greece, Europe

View of the Acropolis of Athens, UNESCO World Heritage Site, from Mouseion Hill, located to the southwest, Athens, Greece, Europe

View of the Acropolis of Athens, UNESCO World Heritage Site, from Mouseion Hill, located to the southwest, Athens, Greece, Europe

The 18th century Palamidi Fortress citadel with bastion on the hill, Nafplion, Peloponnese, Greece, Europe

Statue of Liberation Monument (Liberty Statue), The Citadel, Gellert Hill, Budapest, Hungary, Europe

View over rooftops from the citadel ramparts, waterside houses reflected in calm sea, St-Florent, Haute-Corse, Corsica, France, Mediterranean, Europe

The 18th century Palamidi Fortress citadel with a bastion on the hill, Nafplion, Peloponnese, Greece, Europe

View across harbour to the town and citadel, hills of the Cap Corse peninsula beyond, St-Florent, Haute-Corse, Corsica, France, Mediterranean, Europe

The 18th-century Palamidi Fortress citadel with a bastion on the hill, Nafplion, Peloponnese, Greece, Europe

Overview of the city at sunset from The Citadel on Gellert Hill, Budapest, Hungary, Europe

The old citadel of Evisa perched on the hill surrounded by mountains, Southern Corsica, France, Europe

Aerial view of old Venetian harbor and Fortezza, citadel of the seaside town of Rethymno, Crete island, Greek Islands, Greece, Europe

The old citadel of Corte perched on the hill surrounded by mountains, Haute-Corse, Corsica, France, Europe

Rupea Citadel in Brasov County, Romania, Europe

The Citadel, 14th c Bulgar capital, Velike Turnove, Bulgaria

Rupea Citadel in Brasov County, Romania, Europe

View over the city and River Danube at sunset from The Citadel on Gellert Hill, Budapest, Hungary, Europe

Rupea Citadel in Brasov County, Romania, Europe

View of the old town of citadel of Corte perched on the hill surrounded by mountains, Haute-Corse, Corsica, France, Europe

Statue of Liberation Monument, The Citadel, Gellert Hill, Budapest, Hungary, Europe

View over the city at dusk from The Citadel on Gellert Hill, Budapest, Hungary, Europe

View over the city and River Danube at dusk from The Citadel on Gellert Hill, Budapest, Hungary, Europe

Hill top church near Viscri, UNESCO World Heritage Site, Transylvania, Romania, Europe

View of The Acropolis, UNESCO World Heritage Site, at sunset from Filopappou Hill, Athens, Greece, Europe

View of The Acropolis, UNESCO World Heritage Site, during late afternoon from Filopappou Hill, Athens, Greece, Europe

Panoramic of the city at dusk from The Citadel on Gellert Hill, Budapest, Hungary, Europe

View of The Acropolis and Likavitos Hill at sunset from Filopappou Hill, Athens, Greece, Europe

View of The Acropolis and Likavitos Hill at dusk from Filopappou Hill, Athens, Greece, Europe

The Citadel with the Buddhist stupa dating from 2nd century AD, from south west, Indus Valley civilization, Mohenjodaro, UNESCO World Heritage Site, Sind (Sindh), Pakistan, Asia

Traditional dressed guards in Fort George, Citadel Hill, a National Historic Site, Halifax, Nova Scotia, Canada, North America

Fort George, Citadel Hill, a National Historic Site, Halifax, Nova Scotia, Canada, North America

Hill town and citadel of San Vicente de la Sonsierra in La Rioja, Northern Spain

Brimstone Hill Fortress National Park, St. Kitts, Leeward Islands, West Indies, Caribbean, Central America

Citadel, Brimstone Hill Fortress National Park, St. Kitts, Leeward Islands, West Indies, Caribbean, Central America

Citadel, Brimstone Hill Fortress National Park, St. Kitts, Leeward Islands, West Indies, Caribbean, Central America

Clock tower on Schlossberg, castle hill, Graz, Austria

Old town, Salzburg, Austria

Ayaz Kala Fortress 2, photo taken from Ayaz Kala Fortress 1, Ayaz Kala, Khorezm, Uzbekistan

View from Mirador San Nicolas, Albayzin, to the Alhambra, Moorish palace, Granada, Andalusia, Spain

View from the Darro River valley up to the Alhambra, Moorish palace, Granada, Andalusia, Spain

View of the castle hill of Arta, Majorca

Fingers of the Statue of Hercules and the Jordanian Flag in front of the Archaeological Museum, Jebel al-Qala, Amman, Jordan

Detail of the Roman Temple of Hercules, Jebel al-Qala, Amman, Jordan

Ruins of the Roman Temple of Hercules, Jebel al-Qala, Amman, Jordan

Gellert Hill with Citadel and Statue, , Budapest, Hungary, Southeast Europe, Europe,

Albaicin quarter, Alhambra, moorish citadel, Nasridens palaces, palace of Karl the fifth, Granada, Andalusia, Spain, Europe

Couple on the hill of the citadel, Aleppo, Syria, Middle East, Asia

TUR, Turkey, Alanya : Turkish Riviera. Harbour at night, sailing boats for tourists, citadell, tower Kizil Kule . |

Historic citadel of Aleppo, Syria, Middle East, West Asia

Panoramic aerial view of Budapest Citadel and city skyline at dusk, Hungary.

The Erechtheion (or Temple of Athena Polias) with sunburst on the Acropolis of Athens, the ancient citadel located on a rocky outcrop overlooking the City of Athens at twilight, Athens, Greece

Architecture at the Acropolis of Athens and a view of the city of Athens at sunset, Athens, Greece

The Erechtheion (or Temple of Athena Polias) with sunburst on the Acropolis of Athens, the ancient citadel located on a rocky outcrop overlooking the City of Athens at twilight, Athens, Greece

View of the Acropolis of Athens from Lycabettus Hill, the center of Athens, Greece, Athens, Greece

PERU Cusco Department Machu Picchu Inca ruins terraces and Huayna Picchu. Cuzco Travel Tourism Holiday Vacation Explore Recreation Leisure Sightseeing Tourist Attraction Tour Destination Machu Picchu Machupicchu Huayna Wayna Peru Peruvian South Southern America Culture Cultural Tranquil Tranquility Sacred Valley Of The Inca Incas Inka Inkas Incan Hill Hillside Trail Mountain Mountainous Mountainside Overlooking Overlook Scenic Landscape View Vista Picturesque Dominant Dominating Prominent Andes Andean Ruins Remains Ancient Civilisation Civilization Peak High Tall Range Altitude Architecture Architectural Archaeology Archaeological UNESCO World Heritage Site Terraces Terraced Terracing Peaceful Landmark Vast Citadel Panorama Panoramic Lost City Remote Spectacular Magnificent Beautiful Secluded Seclusion Isolated Calendar American Cusco South America

PERU Cusco Department Machu Picchu Inca ruins terraces and Huayna Picchu. Cuzco Travel Tourism Holiday Vacation Explore Recreation Leisure Sightseeing Tourist Attraction Tour Destination Machu Picchu Machupicchu Huayna Wayna Peru Peruvian South Southern America Culture Cultural Tranquil Tranquility Sacred Valley Of The Inca Incas Inka Inkas Incan Hill Hillside Trail Mountain Mountainous Mountainside Overlooking Overlook Scenic Landscape View Vista Picturesque Dominant Dominating Prominent Andes Andean Ruins Remains Ancient Civilisation Civilization Peak High Tall Range Altitude Architecture Architectural Archaeology Archaeological UNESCO World Heritage Site Old Historic Peaceful Landmark Vast Citadel Panorama Panoramic Spiritual Ceremonial Lost City Remote Spectacular Magnificent Beautiful Secluded Seclusion Isolated Calendar American Cusco South America

PERU Cusco Department Machu Picchu Inca ruins and Huayna Picchu wall in foreground. Cuzco Travel Tourism Holiday Vacation Explore Recreation Leisure Sightseeing Tourist Attraction Tour Destination Machu Picchu Machupicchu Huayna Wayna Peru Peruvian South Southern America Culture Cultural Tranquil Tranquility Sacred Valley Of The Inca Incas Inka Inkas Incan Hill Hillside Trail Mountain Mountainous Mountainside Overlooking Overlook Scenic Landscape View Vista Picturesque Dominant Dominating Prominent Andes Andean Ruins Remains Ancient Civilisation Civilization Peak High Tall Range Altitude Architecture Architectural Archaeology Archaeological UNESCO World Heritage Site Old Historic Peaceful Landmark Vast Citadel Panorama Panoramic Spiritual Lost City Remote Spectacular Magnificent Beautiful Secluded Seclusion Isolated Wall Calendar American Cusco South America

PERU Cusco Department Machu Picchu Inca ruins terraces visitor sitting on terrace and Huayna Picchu. Cuzco Travel Tourism Holiday Vacation Explore Recreation Leisure Sightseeing Tourist Attraction Tour Destination Machu Picchu Machupicchu Huayna Wayna Peru Peruvian Culture Cultural Tranquil Tranquility Sacred Valley Of The Inca Incas Hill Hillside Trail Mountain Mountainous Mountainside Overlooking Overlook Scenic Landscape View Vista Picturesque Dominant Dominating Prominent Andes Andean Ruins Remains Ancient Civilisation Civilization Peak High Tall Range Altitude Architecture Architectural Archaeology Archaeological UNESCO Peaceful Landmark Vast Citadel Panorama Panoramic Spiritual Lost City Remote Spectacular Magnificent Beautiful Secluded Seclusion Isolated Terrace Terraces Woman Lady Person Sightseer Holidaymaker Alone Solitary Single One 1 Calendar American Cusco South America

The hilltop citadel, the old fortress, castle and mosque in Akhaltsikhe at dusk under storm clouds, Akhaltsikhe, Georgia

Halifax Town Clock in evening sunlight, Nova Scotia, Canada

View of Beaumaris castle at Island of Anglesey with mountain ranges in background, Wales