This recreated Roman outpost stands above its buried predecessor.

This 11th-century fortress is now the seat of Aragon’s state legislature.

The eyes and ears of this tower keep watch over Malta’s Grand Harbor.

This island castle now hosts a world-famous opera festival.

This impressive coastal fortress was destroyed before it was finished.

The history of the oldest fort in Baltistan is steeped in familial rivalry and gruesome deaths.

This 3,000-year-old “opium black fortress” towers over the ancient town named after it.

This underground art installation recreates an ancient date honey storeroom.