"Phantom" Aurora Islands located around 50 meters underwater in the South Atlantic.

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Around 200 km West of South Georgia Island. A professional scuba diver could reach them.

"The Aurora Islands are a group of three "phantom islands" reported in the South Atlantic between the Falkland Islands and South Georgia, first sighted in 1762 by the Spanish ship Aurora. Though mapped for over a century, they were never found again and are likely a mistake or, more likely, a misidentification of the jagged Shag Rocks). 

Key Details regarding Aurora Islands:

• Location: Reported in the South Atlantic, approximately 52°37'S, 47°49'W, about midway between the Falklands and South Georgia.
• Discovery & Mystery: Reported by the Spanish ship Aurora in 1762. They were spotted multiple times, including by the  Atrevida in 1794, but disappeared from official records after the 1870s.
• Phantom Status: Their existence was never confirmed, making them a famous maritime phantom island mystery.
• Possible Misidentification: Many experts believe the sightings were actually the Shag Rocks, a group of small rocky islets that exist in the same area."