![Blue Hole Blue Hole](https://media.timeout.com/images/105255044/750/562/image.jpg)
1. Blue Hole
What is it? 100km off the coast of Belize City is a giant submarine sinkhole on every serious diver’s wish list.
Why go? This Unesco World Heritage Site gives divers a chance to look at impressive underwater stalactites, some of which were formed 150,000 years ago. If swimming with an oxygen tank is not your thing, then enjoy its four shades of blue from the sky. A cozy two-to-six-seater plane will hover over the Half Moon Caye for an hour, giving you plenty of opportunities to nail that perfect picture.