Turtle Shoal, Coffins Patch, Delta Shoal, East Washerwoman Shoal

The Marathon area sports dozens of shallow dive sites, notably East and West Turtle Shoal, Coffins Patch and East Washerwoman Shoal. The remains of the "Ignacio" wreck from 1733 fleet lies amongst the corals of Delta Shoal.

Also in the Delta shallows just east of sombrero light, you'll find remains of the "Ivory Coast" wreck, a slave trading vessel which went aground in 1853 carrying human cargo and ivory from Africa. The remnants can be found in less than 15 feet of water, allowing both divers and snorkelers to enjoy this site.