Alaska and Iceland are hot, at least when it comes to travel trends.

Then there's Florida, Las Vegas, Maui, Europe and the Caribbean. Of course, Paris is always a good idea.

Travel agents recently reported booking more Alaska cruises than any other destination. According to Cruise Lines International Association, nearly 1.1 million passengers cruised in Alaska in 2017 and that number is projected to grow another 7% in 2018.

(See our related gallery, 30 Incredible Things to Do on Your Alaska Vacation)

The data come from an annual survey of 1,355 North American-based travel agency owners, managers and front-line travel agents conducted by Travel Leader's Group, a North American travel company. The survey was conducted over two months from Dec. 20, 2017 to Feb. 19, 2018.

These are the most-booked destinations in the U.S. and the world, along with the most popular up-and-coming travel spots.