Marine archaeologists have located a "unique" ancient temple lost beneath the seabed close to the site of what has been dubbed the "Las Vegas" of the Roman Empire.The temple, thought to date to around 2,000 years ago, is positioned on the opposite side of the Gulf of Pozzuoli to Rome's "Sin City."This ancient city, known as Baiae, was the playground of the Roman elite in its heyday. A fashionable coastal resort, Rome's rich and powerful built luxurious villas at the site—including the emperors Julius Caesar, Nero, and Hadrian—attracted by its beautiful setting and healing natural hot springs, not to mention...