The Neptune Memorial Reef is an underwater cemetery located off the coast of Key Biscayne, Florida. It serves as a final resting place for individuals who choose to have their ashes interred in a unique marine environment. The reef is designed to resemble an ancient city, featuring sculptures and structures that promote marine life. Constructed in 2007, the reef is part of a larger effort to create artificial reefs that support ocean ecosystems. It provides a habitat for various marine species while also allowing families to visit and honor their loved ones in a serene underwater setting.