Exploring Vietnam and Cambodia along the Mekong River offers access to traditional villages as well as bustling cities, for a panoramic and immersive experience of these two very different countries. You'll spend seven nights aboard the 48-guest Jahan, an extraordinary new riverboat that offers a level of luxury previously unavailable on the Mekong.

Spend several extraordinary days in the company of majestic gray whales in Mexico's Bahía Magdalena, one of the best places in the world to witness interactions between gray whale mothers and their curious calves. On this compact trip, we'll navigate the length of the bay aboard our nimble expedition ship, and set out by Zodiac for thrilling, up-close encounters.

Explore Darwin's islands in one action-filled week aboard the elegant National Geographic Islander ll.