Neptune Memorial Reef
The Neptune Memorial Reef is an underwater columbarium in what was conceived by the creator as the world's largest artificial reef, covering over 600,000 square feet (56,000 m2) of ocean floor at a depth of 40 feet (12 m). It was originally conceived by Gary Levine and designed by artist Kim Brandell and known as the Atlantis Reef Project or the Atlantis Reef.