Czech Republic, South Bohemia, Cesky Krumlov, View of the Chateaux and Round Tower illuminated at night.

Panoramic view over moored boats in the harbour toward hilltop fortifications.

Chateau Padern. Ruined fortifications perched on steep rocky hillside above village amongst cypress trees with mountain backdrop.

View across water towards the Old City fortifications along the coastline and houses built into the hillside.

Great Zimbabwe Ruins. Granite fortifications on hilltop.

Castelo dos Mouros. Fortifications of eighth century Moorish castle

Peyrepertuse Cathar Castle. Ruined fortifications of eleventh century castle on rocky hillside.