For 60 years, the town of St. Thomas lay beneath the waters of Lake Mead. In 2002, St. Thomas re-emerged from the shrinking lake and scientists don't expect the site to ever be under water again ...

Lake Mead is the country’s largest reservoir with 200,000 acres of water and depths surpassing 500 feet, said Christie Vanover, spokeswoman with Lake Mead National Recreation Area.