New discoveries reveal the scandals and secrets of Nero and the Domus Aurea, his lost palace; and using cutting-edge technology, experts might confirm if the infamous emperor burned down Rome so he could build this golden wonder.

The lost Roman city of Baiae, situated on the northwest shore of the Gulf of Naples, was the Las Vegas of the ancient world -- until a mysterious calamity caused it to sink into the sea. New discoveries reveal the secrets of this sin city that, like Pompeii, some experts believe was destroyed by a supervolcano.