© Mares, Predrag Vuckovic
Great Blue Hole - Belize
The Great Blue Hole sits just off Lighthouse Reef in Belize and is one of the most famous marine sinkholes in the world. It is 407 feet deep, with many stalactites to be seen. This is an advanced dive due to the depth and seemingly bottomless hole. It is easy to get too deep too fast, so watch your gauges!