From vibrantly colored reefs in the Maldives to centuries-old temples in Sri Lanka (and so much more), here's why a land-and-sea combo could be one of the dreamiest vacations you've taken.

Swim with massive humpback whales in the Dominican Republic! A breathtaking, up-close encounter with an energetic calf puts on an adorable show.

The pristine reefs of Tubbataha Reefs Natural Park and Visayas provide the backdrop for a 10-day family dive trip to the Philippines.

New divers can learn a lot on a liveaboard trip from the staff, crew and veteran divers who will surround you for a week or more.