My alarm clock is set for 5 a.m. so I can make the 10 a.m. flight to Atlanta, where I will connect for a 12:30 p.m. flight to Belize.

Our coast-to-coast dive guide for the best sites, condition reports, where to stay, and topside adventures.

This one-of-a-kind floating gallery boutique hotel travels to Indonesia’s most exquisitely biodiverse hidden corners.

ASK DAN: What Do I Need to Know About Decongestants and Diving?

A repeat diver luxuriates in the lively shallows of the Great Blue Hole, a beautiful side of the site most divers fin straight past.

These wrecks along the African island’s north-western coast cater to every dive level, offering encounters from turtles and tuna to candy crabs and nudis.

Goliath grouper spawning, manatee snorkeling, freshwater springs, shark diving: it's all here, and this is when you can do it.

Zapote Cenote, nicknamed Hells Bells, gives divers the chance to get up close and personal with a rare underwater phenomenon.

These are the greatest places to explore unique geologic formations, according to our annual Readers Choice survey.