Welcome to Episode 3 of our Ancient World series, in this episode Bettany heads to the Bay of Naples, where in the middle of a volcanic landscape a Roman city now lies underwater. The Roman city at Baia is now submerged due to volcanic movement, the site has become a vast archaeological marine park, with statues, villas and mosaics visible underwater. Often referred to as the Las Vegas of the Roman world, it was the playground of the Roman elite. Bettany heads to Baia to see the site and Lucy finds out more about how it has become an archaeological park, allowing visitors to explore the remains by diving or snorkelling in the clear waters of the bay.