A triangular lunette at the Castillo del Morro, a fortess at the entrance to the Bay of Santiago, UNESCO World Heritage Site, 10 km southwest of Santiago de Cuba, Cuba, West Indies, Central America

Kiz-Kala fortress, dating from the 6th century AD, Old Merv, UNESCO World Heritage Site, Turkmenia, Turkmenistan, Central Asia, Asia

Cuban coastline and the Castillo del Morro, a fortess at the entrance to the Bay of Santiago, UNESCO World Heritage Site, 10 km southwest of Santiago de Cuba, Cuba, West Indies, Central America

A view of the Gonio Fortess outside Batumi, Georgia, Eurasia

Syria, Haura, Bosra Ancient Roman Capital Of The Arabia Province, Child On A Bike Passing By The Fortess Walls, At Back The Theater