9Blue Hole, Lighthouse Reef, Belize

Known as one for the bucket list, the blue sinkhole is identifiable by its contrasting blue colors, showing the deepest, darkest blue alongside the lighter, shallower colors. The blue hole measures nearly 305m across and 124m down into the earth.

Divers come from far and wide to experience this wonder. Descending the first 30m mostly consist of sheer walls on all sides, once you pass this, the walls turn to stalactite formations made of limestone. If you are an inexperienced diver, this sheer drop off can be extremely disorientating, causing them to descend at an even faster rate.

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