Vicky Matthews

Experts examine the ruins and relics hidden under London. Among them, a Roman amphitheater, ditches for victims of the black plague, bomb shelters and more.

A tour of the Tower of London, which has served as a royal castle, prison, place of execution and torture, armory and mint during its almost 1000 years of existence.

Known as the setting of "Downton Abbey," Highclere Castle truly was the home of aristocrats and an army of servants, with a rich past to share.