Jamahiriya Museum, Tripoli Castle, Tripoli, Libya, North Africa, Africa

Historic castle in Alter do Chao, built in the 14th century, Alentejo, Portugal, Europe

Castle of Good Hope, Cape Town, Western Cape, South Africa, Africa

Caerphilly Castle, Caerphilly, Gwent, Wales, United Kingdom, Europe

Townscape of Caerphilly, Gwent, Wales, United Kingdom, Europe

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

View of Old Fortress of Corfu in Corfu Town, UNESCO World Heritage Site, Corfu, Ionian Sea, Greek Islands, Greece, Europe

Fosa Miejska (City Moat), Old Town, Wroclaw, Silesia, Poland, Europe

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

Caerphilly Castle, Caerphilly, Gwent, Wales, United Kingdom, Europe

Piazza Savonarola and castle moat, Ferrara, Emilia Romagna, Italy, Europe

Tourists in the dry moat surrounding the city walls and fortress in Rhodes Town, Rhodes, Dodecanese, Greek Islands, Greece, Europe

Warkworth Castle in Northumberland, UK.

Warkworth Castle in Northumberland, UK.

Yozakura Takada, Niigata Prefecture, Japan

Tokyo, Japan

Hokkaido, Japan

Ehime Prefecture, Japan

Aerial view of the old town of Celle with castle and grounds, Celle, Lower Saxony, northern Germany

Aerial view, from left Marienplatz, Rosenturm, town wall, Catholic parish of St. Johannes, St. Johannes church 14th century, right below Annakapelle, behind it Catholic parish centre St. Johannes, far right town moat, above back Rosenberg fortress, upper town, old town, Kronach, Upper Franconia, Franconia, Bavaria, Germany

Neutorzwinger bailey, castle moat, bridge, city gate, fortified tower, city wall, bridge, old town, Nuremberg, Middle Frankonia, Frankonia, Bavaria, Germany, Europe

Medieval Rocca fortress with moat in Riva del Garda, Lake Garda, Trentino, Alto Adige, Italy, Europe

Panorama of Portsmouth with Royal Garrison Church, Domus Dei, Spinnaker Tower, King's Bastion moat and Waterfront Millennium Promenade from King's Bastion, Old Portsmouth, Hampshire, England, United Kingdom, Europe

Cityscape at the town's moat with Blue Tower, Bad Wimpfen, Neckartal, Baden-Wuerttemberg, Germany, Europe

Cityscape at the town's moat with Birkensee Lake, Bad Wimpfen, Neckartal, Baden-Wuerttemberg, Germany, Europe

Cityscape at the town's moat with Blue Tower, Bad Wimpfen, Neckartal, Baden-Wuerttemberg, Germany, Europe

Cityscape at the town's moat with Birkensee Lake, Bad Wimpfen, Neckartal, Baden-Wuerttemberg, Germany, Europe