Underwater World Aquatic Myths, Mysteries and the Unexplained (Tamara Macfarlane)

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Page 66 of 82 64 Deep sea dis coveries Blue holes Blue holes ar e un derw ater sin kho les. T he most fam ous is th e Great Blue Ho le in B elize, whic h is a ro und 300 m (10 00ft) across a nd 125m (40 0ft) deep. Underw ater wat erfal ls The larg est water fall in t he wo rld is act ually in th e ocea n, betw een Green land an d Icela nd. It cas cades for more th an 3,500 m (1 1,5 00ft) ! To lear n more about the Gre at Blue Hole, scient ists used special came ras a nd sona r t o map it s peri…