This stunning 9-feet tall bronze mermaid sculpture of Amphitrite, created in 2000 by Simon Morris, rests 50 feet beneath the waves on Grand Cayman Island. In Greek mythology, Amphitrite was the wife of Poseidon, the queen of the seas and the mother of seals and dolphins. A statue probably depicting Queen Cleopatra III, discovered in the sunken city of Heracleion Since the Egyptian city was lost thousands of years ago due to a combination of earthquakes, tsunamis, and rising sea levels, historians debated whether it ever even existed.