Caribbean cruising and Las Vegas are the top international and domestic destinations for 2007, according a survey of data booked by 507 Carlson Wagonlit Travel associates. Internationally, the Caribbean may come as no surprise, but the CWT report noted that over the last four years, Rome has continued to climb the ranks of its survey, earning a spot in the top five this year. Meanwhile, Las Vegas for the fifth year in a row edged out Orlando as the most popular U.S. vacation spot, with 78 percent of CWT agent bookings slated for Sin City.