A series of linear features have been documented along the shorelines and inlets of the United Kingdom.  Many of the features appear similar to ancient fish traps dated to be 1,000 years old.

Two underwater linear features off the coast of the Bahamas.

Underwater, linear feature found in Cornwall, England.

Linear features approximately 6 feet wide visible around the coast line of Belize on the Yucatan peninsula.

Linear features between the Cayo Rosario and Cayo Cantiles off the coast of Cuba.

Underwater, linear, gridded area in the Cayo Santa Maria off the coast of Cuba.

Approximately 300 miles South of the Nasca lines in Peru, more unusual lines have been found.

Underwater linear features off the coast of Cuba.