Snorkeling and diving are some of the best in the world.

Perhaps this is the biggest reason you want to visit Belize, but if you don't already know, the country's snorkeling and scuba diving are among the greatest in the world. It is home to the world's second-longest barrier reef (after the one in Australia), which means coral and sea life are rich and diverse. This is the first thing that you need to know before traveling to Belize.

The Great Blue Hole is a massive circular sinkhole off the coast that is 984 feet (300 meters) in diameter and 354 feet (108 meters) in depth. Although it is mostly for expert divers, beginners can schedule a helicopter trip for a breathtaking overhead perspective. Snorkeling cruises to Hol Chan Marine Reserve are also popular, where you may see nurse sharks, stingrays, tropical fish, hawksbill turtles, and sponges. This is the first thing you should know before traveling to Belize, you may feel so amazing!