If you’re in Belize, seeing the Great Blue Hole is an absolute must — it’s one of those sights that totally blows you away. From above, it’s this perfect, deep blue circle in the middle of the ocean, and seeing it from a boat or on a flight is unreal. It’s about 300 meters across and over 120 meters deep, so it’s massive and honestly looks like something out of another planet.

Most people visit on a day tour from Belize City or Ambergris Caye, which usually includes stops at nearby reefs, so even if you’re not diving, there’s plenty of amazing snorkeling. If you are a diver, it’s one of the most iconic dives in the world, with stalactites and tropical fish deep down in the crystal-clear water. Tours usually run around 150–250 USD per person for snorkeling, or 300–400 USD for diving.

The best way to experience it is to go early, either by boat or small plane, to avoid the crowds and really take in that unreal blue circle. Honestly, just floating in the turquoise water nearby or looking down from a small plane, it feels like you’ve stepped into another world — one of those experiences you’ll remember forever.