Crenellated

Koblenz, Germany, Stolzenfels Castle, Schloss

Oman, Nakhl, fortress

Kent, England. Originally a Saxon fortress

Europe, Portugal, Sintra. The Pena National

Europe, Portugal, Sintra. The Pena National

Amber Fort, Jaipur, India

Israel, Jerusalem, Dome of the Rock

Delhi, India. Delhi's Red Fort at sunset

Spain - The magnificent crenellated thirtheenth-century