The Church of Saint Anne at Fort St Elmo, Valletta, Malta

The Piazza d'Armi (Parade Ground) at Fort St Elmo, Valletta, Malta

The Piazza d'Armi (Parade Ground) at Fort St Elmo, Valletta, Malta

St Elmo's Breakwater at the mouth of the Grand Harbour, Valletta, Malta

Fort St. Angelo, Grand Harbour, with the superyacht Maltese Falcon at anchor, Valletta, Malta, Mediterranean, Europe

Fort St. Catherine, built in 1614 to defend sea approaches to the island, now a museum, UNESCO World Heritage Site, St George's, Bermuda, Atlantic, North America

Fort St. Catherine, built in 1612, in service until the 20th century, now a museum, UNESCO World Heritage Site, St. George's Island, Bermuda, North Atlantic, North America

Fort St. Angelo, dating from the medieval period and used by the British between 1800 and 1979, Birgu, Malta, Mediterranean, Europe

Fort St. Catherine, built in 1612, in service until the 20th century, now a museum, UNESCO World Heritage Site, St. George's Island, Bermuda, North Atlantic, North America

Rye Castle (Ypres Tower), built around 1249 to resist attacks from France, sometime prison, courthouse and morgue, now a museum, Rye, East Sussex, England, United Kingdom, Europe

Fort St Elmo, Valletta, Malta.

Country road toward mountain, Fort Davis, Texas, United States of America

Woman looking at map, Ford Davis National Historic Site, Texas