Najac Castle, Aveyron, Midi Pyrenees, France, Europe

Lindisfarne castle, Lindisfarne, Holy Island, Northumberland, England, United Kingdom, Europe

Bamburgh castle and Bamburgh beach, Bamburgh, Northumberland, England, United Kingdom, Europe

Linkmenas lake seen from the Ginuciai mound where the famous Linknenys castle stood during the 13th to 15th centuries, Ginuciai, Aukstaitija National Park, Lithuania,Europe

Linkmenas lake seen from the Ginuciai mound where the famous Linknenys castle stood during the 13th to 15th centuries, Ginuciai, Aukstaitija National Park, Lithuania,Europe

The Keep, Carisbrooke Castle, managed by English Heritage, Isle of Wight, England, United Kingdom, Europe

Exterior of 11th century castle on mound at Gisors with flower border below, in Haute Normandie (Normandy), France, Europe

Warkworth Castle in Northumberland, UK.

Warkworth Castle in Northumberland, UK.

Warkworth Castle in Northumberland, UK.

padlocks, locked and the key thrown down the mountain, symbol for couples to pledge faithfulness, mountain, Huang Shan, Anhui province, China, Asia, World Heritage, UNESCO

Wide yard below at the base of Himeji-jo castle on a colourful sunset evening in Himeji, Japan after newly renovated early 2015. Angled horizontal copy space

Hohenzollern Castle in the Swabian Alb at sunset

Colourful palace with yellow and red buildings, dome and towers, surrounded by wooded hills, aerial view, Palácio Nacional da Pena, National Palace Pena, Sintra, Lisbon, World Heritage Site, UNESCO, Portugal, Europe

View of a castle and a white village on a hill at sunset, surrounded by green nature, Chora, main town of Patmos, Patmos, Old Town, Dodecanese, Greek Islands, Greece, Europe

Hohenzollern Castle, the ancestral seat of the House of Hohenzollern, photographed in the evening with the illuminated villages in the background

Autumnal coloured vineyards, Ilbesheim, Southern Wine Route, Palatinate Forest, Rhineland-Palatinate, Germany, Europe

Castell de Bellver Palma de Mallorca

View of the town, castle on hill, sky exchanged, Montalbano Elicona, town, Nebrodi National Park, Sicily, Italy, Europe

Castell de Bellver Palma de Mallorca

The Volcanic Mound Of Beblowe Craig, England

Lindisfarne Castle On A Volcanic Mound Called Beblowe Craig, Holy Island, England

Barn Beside Volcanic Mound Called Beblowe Craig, England

Lindisfarne Castle On A Volcanic Mound Called Beblowe Craig, Holy Island, Bewick, England

The Volcanic Mound Of Beblowe Craig, England

Lindisfarne Castle On A Volcanic Mound Called Beblowe Craig, Holy Island, Bewick, England

Stack of cannon balls on castle roof, Castillo San Cristobal, San Juan, Puerto Rico, San Juan, Puerto Rico, Puerto Rico

View of Brecon Beacons National Park and storm clouds in sky at Wales, UK