Divers explore Blue Hole Spring's underwater cave in Florida

An amazing video has emerged from the US of two divers exploring a the Blue Hole Spring in an underwater cave in Florida.

The footage, captured on April 23, shows the men swimming inside the cave and surfacing through the crystal clear water.

''The spring produces crystal-clear water from the bottom of a 36-foot hole,'' the filmer later wrote online.

''Sun rays beam in from above through the blue water and strike the white sand bottom,'' he added.

Music: 'Fearless' by Kevin Macleod.