America's little-known castles, displaying 'raw power,' are hiding in plain sight

When most Americans think of castles, they likely picture medieval fortresses towering over European hills. 

Yet the history of these imposing structures is much closer to home than many might realize.

Speaking to Fox News Digital from England, historian Dan Jones described his latest book as a 3,000-year journey through human history, from the Sack of Troy to the Nuclear Age, as it explores the broader history of castles and fortifications.

DIVERS UNCOVER ANCIENT TREASURES LINKED...