The Pantheon is a 2,000-year-old temple with a dark secret; today, using cutting-edge archaeological methods and brand-new evidence, experts look beneath the streets of Rome to find out why it was built and how it survived so long.

The timeless icons of ancient Rome serve as monuments to prodigious power, cruel madness, and the epic legends from the world's most-powerful empire; archeologists use cutting-edge tech to reveal the hidden secrets of this great city's classic wonders. This is a mashup of S08E01 "Mystery Of The Volcano Temple" (The Pantheon) and S02E11 "Lost World of the Colosseum."