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

Qasr al-Abd (Fortress of the Servant), 3rd century BD Hellenistic palace west of Aman in Wadi as-Sir, Iraq al-Amir, Jordan, Middle East

Cliff Palace, Mesa Verde, Anasazi culture, Colorado, USA

Eastern facade of the monastery palace of El Escorial, UNESCO World Heritage Site, Madrid, Spain, Europe

The harbour and Prince's Palace at sunset, Monte Carlo, Monaco, Cote d'Azur, Mediterranean, Europe

The Amber Palace from Moata Sagar (lake), Jaipur, Rajasthan State, India, Asia

Hillside Palace, (Bergpalais), Pillnitz, Saxony, Germany, Europe

Hillside Palace, (Bergpalais), Pillnitz, Saxony, Germany, Europe

Peles Castle, the Royal Palace, intended as a summer residence by King Carol I, constructed between 1875 and 1914, Sinaia, Carpathian mountains, Transylvania, Romania, Europe

Footbridge at Monte Palace Tropical Garden, Funchal, Madeira, Portugal, Atlantic, Europe

Kunming Hu Lake, Summer Palace Park, Summer Palace, Beijing, China, Asia

Arg-e Bam, Bam, Iran, Middle East

Viano do Castello, Costa Verde, Portugal

Badal Mahal (Cloud Palace) and walls, Kumbhalgarh Fort, Rajasthan, India, Asia

Potala Palace, UNESCO World Heritage Site, Lhasa, Tibet, China, Asia

Inside Kumbhalgarh Fort, looking towards Cloud Palace, Rajasthan, India, Asia

Arched window with a view from Alhambra; Granada, Andalusia, Spain

Bamburgh, Northumberland, England; View Of Bamburgh Castle From A Sandy Beach

Bamburgh, Northumberland, England; Bamburgh Castle

Amber Palace Fort near Jaipur situated on hillside above lake framed by scalloped edge of silhouetted window, Amber, Rajasthan, India