An amazing video has emerged from the US of two divers exploring a the Blue Hole Spring in an underwater cave in Florida.<br /><br />The footage, captured on April 23, shows the men swimming inside the cave and surfacing through the crystal clear water.<br /><br />''The spring produces crystal-clear water from the bottom of a 36-foot hole,'' the filmer later wrote online.<br /><br />''Sun rays beam in from above through the blue water and strike the white sand bottom,'' he added.<br /><br />Music: 'Fearless' by Kevin Macleod.
